20657209802867910700
20,657,209,802,867,910,700 is an even composite number composed of six prime numbers multiplied together.
What does the number 20657209802867910700 look like?
This visualization shows the relationship between its 6 prime factors (large circles) and 1800 divisors.
20657209802867910700 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one thousand, eight hundred divisors.
Prime factorization of 20657209802867910700:
22 × 52 × 194 × 23 × 293 × 414
(2 × 2 × 5 × 5 × 19 × 19 × 19 × 19 × 23 × 29 × 29 × 29 × 41 × 41 × 41 × 41)See below for interesting mathematical facts about the number 20657209802867910700 from the Numbermatics database.
Names of 20657209802867910700
- Cardinal: 20657209802867910700 can be written as Twenty quintillion, six hundred fifty-seven quadrillion, two hundred nine trillion, eight hundred two billion, eight hundred sixty-seven million, nine hundred ten thousand, seven hundred.
Scientific notation
- Scientific notation: 2.06572098028679107 × 1019
Factors of 20657209802867910700
Divisors of 20657209802867910700
- Number of divisors d(n): 1800
-
Complete list of divisors:
1 2 4 5 10 19 20 23 25 29 38 41 46 50 58 76 82 92 95 100 115 116 145 164 190 205 230 290 361 380 410 437 460 475 551 575 580 667 722 725 779 820 841 874 943 950 1025 1102 1150 1189 1334 1444 1450 1558 1681 1682 1748 1805 1886 1900 2050 2185 2204 2300 2378 2668 2755 2900 3116 3335 3362 3364 3610 3772 3895 4100 4205 4370 4715 4756 5510 5945 6670 6724 6859 7220 7790 8303 8405 8410 8740 9025 9430 10469 10925 11020 11890 12673 13340 13718 13775 14801 15580 15979 16606 16675 16810 16820 17917 18050 18860 19343 19475 20938 21025 21850 22591 23575 23780 24389 25346 27347 27436 27550 29602 29725 31939 31958 33212 33350 33620 34295 34481 35834 36100 38663 38686 38950 41515 41876 42025 42050 43700 45182 47150 48749 48778 50692 52345 54694 55100 59204 59450 63365 63878 63916 66700 68590 68921 68962 71668 74005 77326 77372 77900 79895 83030 84050 84100 89585 90364 94300 96715 97498 97556 104690 109388 112955 118900 121945 126730 127756 130321 136735 137180 137842 137924 148010 154652 157757 159695 159790 166060 168100 171475 172405 179170 193315 193430 194996 198911 207575 209380 225910 240787 243745 243890 253460 260642 261725 273470 275684 281219 296020 303601 315514 316825 319390 319580 340423 342950 344605 344810 358340 367517 370025 386630 386860 397822 399475 415150 429229 447925 451820 463391 481574 483575 487490 487780 519593 521284 523450 546940 560947 562438 564775 606841 607202 609725 631028 633650 638780 651605 655139 680846 683675 685900 689210 689620 734597 735034 740050 773260 788785 793063 795644 798475 798950 830300 858458 862025 895850 926231 926782 963148 966575 967150 974980 994555 999949 1039186 1046900 1121227 1121894 1124876 1129550 1203935 1213682 1214404 1218725 1219450 1267300 1303210 1309499 1310278 1361692 1367350 1378420 1406095 1413721 1469194 1470068 1480100 1518005 1577570 1585183 1586126 1596950 1597900 1702115 1716916 1723025 1724050 1791700 1837585 1852462 1853564 1933150 1934300 1989110 1998709 1999898 2078372 2146145 2242454 2243788 2259100 2316955 2407870 2427364 2437450 2438900 2597965 2606420 2618998 2620556 2734700 2804735 2812190 2825761 2827442 2938388 2997383 3034205 3036010 3155140 3170366 3172252 3193900 3258025 3275695 3404230 3446050 3448100 3672985 3675170 3704924 3779309 3866300 3943925 3965315 3978220 3997418 3999796 4292290 4484908 4574953 4631155 4633910 4815740 4874900 4972775 4999745 5195930 5237996 5343161 5606135 5609470 5624380 5651522 5654884 5768419 5994766 6019675 6068410 6072020 6340732 6468037 6516050 6547495 6551390 6808460 6892100 6982823 7030475 7068605 7345970 7350340 7558618 7590025 7887850 7925915 7930630 7994836 8155351 8510575 8584580 8804429 9149906 9187925 9262310 9267820 9872267 9945550 9993545 9999490 10391860 10657993 10686322 10730725 11212270 11218940 11303044 11529979 11536838 11584775 11989532 12039350 12136820 12447641 12936074 12989825 13032100 13094990 13102780 13957343 13965646 14023675 14060950 14128805 14137210 14691940 14986915 15068197 15117236 15171025 15180050 15775700 15851830 15861260 16310702 16378475 17021150 17598389 17608858 18299812 18364925 18375850 18524620 18896545 18999031 19744534 19826575 19891100 19987090 19998980 21303313 21315986 21372644 21461450 22424540 22874765 22998827 23059958 23073676 23155775 23169550 24078700 24880481 24895282 24998725 25872148 25979650 26189980 26715805 26860699 27914686 27931292 28030675 28047350 28121900 28257610 28274420 28842095 29973830 30118477 30136394 30342050 30360100 31703660 32340185 32515583 32621404 32737475 32756950 34042300 34914115 35196778 35217716 35343025 36729850 36751700 37793090 37975471 37998062 39489068 39629575 39653150 39974180 40776755 40997909 42606626 42631972 42922900 44022145 45749530 45970307 45997654 46119916 46311550 46339100 49361335 49760962 49790564 49967725 49997450 51959300 53289965 53431610 53689459 53721398 55829372 56061350 56094700 56515220 57649895 57684190 57962561 59947660 60236954 60272788 60684100 62238205 64680370 64992503 65031166 65474950 65513900 69786715 69828230 70393556 70644025 70686050 73459700 74934575 75340985 75586180 75950942 75996124 79259150 79306300 81553510 81947069 81995818 85213252 86924107 87991945 88044290 91499060 91940614 91995308 92623100 94482725 94995155 98722670 99521924 99935450 99994900 106516565 106579930 106863220 107378918 107442796 109599961 112122700 114373825 114994135 115299790 115368380 115925122 120473908 122892703 124402405 124476410 129360740 129985006 130062332 130949900 132673637 133579025 134303495 139573430 139656460 141288050 141372100 144210475 149869150 150592385 150681970 151901884 154951669 158518300 161700925 162577915 163107020 163894138 163991636 167284151 173848214 174570575 175983890 176088580 183881228 187573073 188965450 189877355 189990310 197445340 199870900 202501867 203883775 204989545 213033130 213159860 214757836 219069601 219199922 220110725 228747650 229851535 229988270 230599580 231850244 236505179 245785406 246806675 248804810 248952820 259970012 265189517 265347274 266449825 267158050 268447295 268606990 279146860 282576100 286295743 288249475 288420950 289812805 299738300 301184770 301363940 309903338 311191025 323401850 324962515 325155830 327788276 334369391 334568302 347696428 348933575 349141150 351967780 360981589 375146146 376704925 377930900 379754710 379980620 404762947 405003734 407767550 409735345 409979090 426066260 434620535 436977713 438139202 438399844 439959725 440221450 457495300 459703070 459976540 472729139 473010358 474975775 491570812 493613350 497609620 510353281 530379034 530694548 532582825 532899650 534316100 536894590 537213980 547999805 572251063 572591486 574970675 576498950 576841900 579625610 602369540 614463515 617796077 619806676 622012025 622382050 646803700 649925030 650311660 663368185 668738782 669136604 671517475 697867150 698282300 721533949 721963178 750292292 752961925 753409850 759509420 774758345 778960271 809525894 810007468 812889575 815535100 819470690 819958180 836420755 869241070 873435833 873955426 876278404 879919450 880442900 919406140 937865365 942951907 945458278 946020716 949386775 949951550 987226700 1012509335 1020099721 1020706562 1024947725 1060758068 1065165650 1065799300 1073789180 1095348005 1095999610 1101288659 1144502126 1145182972 1149257675 1149941350 1152997900 1159251220 1182525895 1228927030 1234857557 1235592154 1244024050 1244764100 1299850060 1325947585 1326736370 1333138903 1337477564 1342236475 1343034950 1395734300 1431478715 1443067898 1443926356 1449064025 1505923850 1506819700 1549516690 1556994311 1557920542 1619051788 1624812575 1625779150 1638941380 1671846955 1672841510 1680914269 1738482140 1746871666 1747910852 1759838900 1804907945 1875730730 1884782587 1885903814 1890916556 1898773550 1899903100 2023814735 2025018670 2040199442 2041413124 2048676725 2049895450 2130331300 2173102675 2184888565 2190696010 2191999220 2202577318 2289004252 2298515350 2299882700 2363645695 2365051790 2376465001 2457854060 2469715114 2471184308 2488048100 2520799103 2551766405 2651895170 2653472740 2666277806 2684472950 2686069900 2739999025 2861255315 2862957430 2886135796 2898128050 3011847700 3072317575 3088980385 3099033380 3113988622 3115841084 3178398869 3249625150 3251558300 3316840925 3343693910 3345683020 3361828538 3493743332 3563888387 3607669745 3609815890 3751461460 3769565174 3771807628 3797547100 3847535473 3873791725 3894801355 4047629470 4050037340 4080398884 4097353450 4099790900 4182103775 4346205350 4367179165 4369777130 4381392020 4405154636 4493598401 4597030700 4689326825 4714759535 4727291390 4730103580 4752930002 4939430228 5038600823 5041598206 5062546675 5100498605 5103532810 5303790340 5332555612 5368945900 5439619117 5476740025 5479998050 5506443295 5722510630 5725914860 5796256100 5912629475 6144635150 6174287785 6177960770 6227977244 6353018429 6356797738 6499250300 6629737925 6633681850 6665694515 6687387820 6723657076 6858650191 7127776774 7157393575 7215339490 7219631780 7539130348 7690495993 7695070946 7747583450 7784971555 7789602710 8095258940 8194706900 8302576547 8359234775 8364207550 8404571345 8692410700 8734358330 8739554260 8981853641 8987196802 9024539725 9378653650 9423912935 9429519070 9454582780 9505860004 9696712339 10077201646 10083196412 10119073675 10125093350 10200997210 10207065620 10872770197 10879238234 10924442825 10953480050 10959996100 11012886590 11445021260 11738125463 11818228475 11825258950 11882325005 12289270300 12348575570 12355921540 12603995515 12706036858 12713595476 12758832025 13259475850 13267363700 13331389030 13709145031 13717300382 14255553548 14306276575 14314787150 14430678980 14800245149 15380991986 15390141892 15444901925 15495166900 15569943110 15579205420 15891994345 16595280827 16605153094 16718469550 16728415100 16809142690 17468716660 17819441935 17916086233 17963707282 17974393604 18038348725 18049079450 18757307300 18847825870 18859038140 19237677365 19381894699 19393424678 19474006775 20154403292 20238147350 20250186700 20401994420 20924484521 21745540394 21758476468 21835895825 21848885650 21906960100 22025773180 22467992005 23462293583 23476250926 23573797675 23636456950 23650517900 23764650010 24697151140 25193004115 25207991030 25329639157 25412073716 25502493025 25517664050 26518951700 26662778060 27198095585 27418290062 27434600764 27532216475 28612553150 28629574300 29582891909 29600490298 30761983972 30871438925 30889803850 31139886220 31765092145 31783988690 31937371111 33190561654 33210306188 33328472575 33436939100 33618285380 34293250955 35638883870 35810869153 35832172466 35927414564 36076697450 36098158900 37695651740 38452479965 38475354730 38661028187 38763789398 38786849356 38924857775 38948013550 40476294700 41512882735 41848969042 42022856725 43491080788 43671791650 43697771300 44909268205 44935984010 45152835019 46924587166 46952501852 47119564675 47147595350 47272913900 47529300020 48483561695 50386008230 50415982060 50659278314 51004986050 51035328100 54363850985 54396191170 54658695023 54836580124 55064432950 57225106300 58690627315 59165783818 59200980596 59411625025 61742877850 61779607700 63019977575 63530184290 63567977380 63874742222 66381123308 66656945150 68545725155 68586501910 68917485029 71277767740 71621738306 71664344932 72153394900 73103173987 74001225745 76904959930 76950709460 77322056374 77527578796 77849715550 77896027100 79459971725 82976404135 83025765470 83697938084 84045713450 87343583300 89097209675 89580431165 89818536410 89871968020 90305670038 93849174332 94239129350 94295190700 96188386825 96909473495 96967123390 100772016460 101318556628 102009972100 103352763223 104622422605 108727701970 108792382340 109317390046 110128865900 112339960025 117311467915 117381254630 118331567636 118823250050 123485755700 125965020575 126039955150 126648195785 127060368580 127749484444 130314353629 133313890300 135990477925 137091450310 137173003820 137834970058 143243476612 146119423867 146206347974 147914459545 148002451490 153809919860 154644112748 155699431100 157748954393 158825460725 158919943450 159686855555 165952808270 166051530940 168091426900 171466254775 178194419350 179054345765 179160862330 179637072820 180611340076 184237534441 188478258700 192262399825 192376773650 193305140935 193818946990 193934246780 206582633743 206705526446 207564413675 209244845210 217455403940 218634780092 223024383797 224546341025 224679920050 225764175095 234622935830 234762509260 237646500100 242417808475 251930041150 252079910300 253296391570 260473755589 260628707258 271819254925 271980955850 273293475115 274182900620 275669940116 281204657831 292238847734 292412695948 293453136575 295828919090 296004902980 315310335713 315497908786 317650921450 317839886900 319373711110 331905616540 340405638427 342728625775 342932509550 344587425145 356388838700 358108691530 358321724660 365515869935 368255999281 368475068882 370006128725 384524799650 384753547300 386610281870 387637893980 397565205899 413165267486 413411052892 414882020675 415128827350 418489690420 445783578077 446048767594 447902155825 449092682050 449359840100 451528350190 469245871660 481263143983 484547367475 484835616950 503860082300 506592783140 516763816115 520947511178 521257414516 523112113025 543638509850 543961911700 546586950230 562074946271 562409315662 584477695468 586557339575 586906273150 591657838180 606810051109 630620671426 630995817572 633240978925 635301842900 638747422220 651571768145 680406513907 680811276854 685457251550 685865019100 689174850290 716217383060 730597119335 731031739870 734559535553 736511998562 736950137764 739572297725 740012257450 769049599300 773220563740 788744771965 795130411798 798434277775 826330534972 829764041350 830257654700 857903865361 891567156154 892097535188 895271728825 895804311650 898185364100 903056700380 921187672205 962526287966 966525704675 969094734950 969671233900 1032913168715 1033527632230 1038515205437 1041895022356 1046224226050 1087277019700 1093173900460 1115121918985 1124149892542 1124818631324 1128820875475 1173114679150 1173812546300 1213620102218 1261241342852 1266481957850 1302368777945 1303143536290 1309432215551 1360813027814 1361622553708 1366467375575 1370914503100 1378349700580 1406023289155 1461194238670 1462063479740 1469119071106 1473023997124 1479144595450 1480024514900 1576551678565 1577489543930 1585102155667 1590260823596 1596868555550 1659528082700 1702028192135 1715807730722 1722937125725 1783134312308 1790543457650 1791608623300 1827579349675 1841279996405 1842375344410 1925052575932 1933051409350 1938189469900 1987826029495 2065826337430 2067055264460 2077030410874 2092448452100 2228917890385 2230243837970 2248299785084 2257641750950 2346229358300 2406315719915 2427240204436 2532963915700 2583819080575 2604737555890 2606287072580 2618864431102 2721626055628 2732934751150 2810374731355 2812046578310 2922388477340 2938238142212 2958289190900 2997230133467 3034050255545 3153103357130 3154979087860 3170204311334 3193737111100 3257858840725 3402032569535 3404056384270 3431615461444 3445874251450 3581086915300 3652985596675 3655158699350 3672797677765 3682559992810 3684750688820 3866102818700 3943723859825 3975652058990 4131652674860 4154060821748 4237463292143 4289519326805 4457835780770 4460487675940 4515283501900 4605938361025 4812631439830 5164565843575 5167638161150 5192576027185 5209475111780 5237728862204 5342888498789 5465869502300 5575609594925 5620749462710 5624093156620 5990896378547 5994460266934 6068100511090 6306206714260 6340408622668 6467707130113 6511843889725 6515717681450 6547161077755 6804065139070 6808112768540 6891748502900 7030116445775 7305971193350 7310317398700 7345595355530 7365119985620 7553738912081 7882758392825 7887447719650 7925510778335 7951304117980 8469887983463 8474926584286 8510140960675 8579038653610 8915671561540 9143999735677 9206399982025 9211876722050 9625262879660 9939130147475 10329131687150 10335276322300 10385152054370 10679423979149 10685776997578 11144589451925 11151219189850 11241498925420 11529390971071 11981792757094 11988920533868 12031578599575 12136201022180 12927723764233 12935414260226 13023687779450 13031435362900 13094322155510 13608130278140 13956631175507 14051873656775 14060232891550 14611942386700 14691190711060 14986150667335 15107477824162 15170251277725 15765516785650 15774895439300 15851021556670 16300173441859 16939775966926 16949853168572 17010162847675 17020281921350 17158077307220 18287999471354 18363988388825 18412799964050 18423753444100 19731788903303 19878260294950 20658263374300 20770304108740 21187316460715 21358847958298 21371553995156 21447596634025 22289178903850 22302438379700 23058781942142 23963585514188 24063157199150 24879212095469 25855447528466 25870828520452 25962880135925 26047375558900 26188644311020 26714442493945 27913262351014 28103747313550 28120465783100 29954481892735 29972301334670 30116940957673 30214955648324 30340502555450 31531033571300 31702043113340 32338535650565 32600346883718 32735805388775 33879551933852 34020325695350 34040563842700 36575998942708 36727976777650 36825599928100 37768694560405 39463577806606 39627553891675 39756520589900 42349439917315 42374632921430 42717695916596 42895193268050 44578357807700 45719998678385 46117563884284 48126314398300 49758424190938 51710895056932 51925760271850 53397119895745 53428884987890 55826524702028 56207494627100 57646954855355 59908963785470 59944602669340 60233881915346 60681005110900 64638618821165 64677071301130 65200693767436 65471610777550 68040651390700 69783155877535 73455953555300 74930753336675 75537389120810 78927155613212 79255107783350 81500867209295 84698879834630 84749265842860 85790386536100 91439997356770 98658944516515 99516848381876 103851520543700 105936582303575 106794239791490 106857769975780 115293909710710 119817927570940 120467763830692 122886435472147 124396060477345 129277237642330 129354142602260 130943221555100 133572212469725 139566311755070 149772409463675 149861506673350 150584704788365 151074778241620 158510215566700 161692678252825 163001734418590 169397759669260 173735994977863 182879994713540 188843472802025 197317889033030 211747199586575 211873164607150 213588479582980 219058428450349 228599993391925 230587819421420 245626751520427 245772870944294 248792120954690 258554475284660 265175992334633 266985599478725 267144424939450 279132623510140 288234774276775 299544818927350 299723013346700 301169409576730 309703295395321 323193094105825 323385356505650 326003468837180 347471989955726 348915779387675 374903989162757 377686945604050 394635778066060 407504336046475 423494399173150 423746329214300 438116856900698 457199986783850 472705029813911 491253503040854 491545741888588 493294722582575 497584241909380 530351984669266 533971198957450 534288849878900 572221878195787 576469548553550 599089637854700 602338819153460 614432177360735 619406590790642 621980302386725 646386188211650 646770713011300 694943979911452 697831558775350 749807978325514 752923523941825 755373891208100 815008672092950 846988798346300 868679974889315 876233713801396 914399973567700 945410059627822 982507006081708 986589445165150 1060703969338532 1067942397914900 1095292142251745 1144443756391574 1152939097107100 1228133757602135 1228864354721470 1238813181581284 1243960604773450 1292772376423300 1325879961673165 1395663117550700 1499615956651028 1505847047883650 1548516476976605 1630017344185900 1737359949778630 1874519945813785 1890820119255644 1973178890330300 2190584284503490 2288887512783148 2363525149069555 2456267515204270 2457728709442940 2487921209546900 2651759923346330 2861109390978935 3011694095767300 3072160886803675 3097032953953210 3474719899557260 3749039891627570 4343399874446575 4381168569006980 4727050298139110 4912535030408540 5038343854358027 5303519846692660 5476460711258725 5722218781957870 6140668788010675 6144321773607350 6194065907906420 6629399808365825 7123175794092383 7498079783255140 7742582384883025 8686799748893150 8981395566464309 9372599729068925 9454100596278220 10076687708716054 10872215685719953 10952921422517450 11444437563915740 11817625745347775 12281337576021350 12288643547214700 13258799616731650 14246351588184766 14305546954894675 15485164769766050 17373599497786300 17962791132928618 18745199458137850 20153375417432108 21744431371439906 21905842845034900 23635251490695550 24562675152042700 25191719271790135 26517599233463300 28492703176369532 28611093909789350 30970329539532100 35615878970461915 35925582265857236 37490398916275700 43488862742879812 44906977832321545 47270502981391100 50383438543580270 54361078428599765 57222187819578700 71231757940923830 89813955664643090 100766877087160540 108722156857199530 125958596358950675 142463515881847660 178079394852309575 179627911329286180 206572098028679107 217444313714399060 224534889161607725 251917192717901350 271805392142998825 356158789704619150 413144196057358214 449069778323215450 503834385435802700 543610784285997650 712317579409238300 826288392114716428 898139556646430900 1032860490143395535 1087221568571995300 2065720980286791070 4131441960573582140 5164302450716977675 10328604901433955350 20657209802867910700
- Sum of all divisors σ(n): 52415403641430026400
- Sum of proper divisors (its aliquot sum) s(n): 31758193838562115700
- 20657209802867910700 is an abundant number, because the sum of its proper divisors (31758193838562115700) is greater than itself. Its abundance is 11100984035694205000
Bases of 20657209802867910700
- Binary: 100011110101011010010011011011110011111101010100010101000001011002
- Hexadecimal: 0x11EAD26DE7EA8A82C
- Base-36: 4CXZ5QFD7U6NG
Squares and roots of 20657209802867910700
- 20657209802867910700 squared (206572098028679107002) is 426720316839702106043354631783174490000
- 20657209802867910700 cubed (206572098028679107003) is 8814851112103995136611396379281054962323528199838043000000
-
The
square root of 20657209802867910700 is 4545020330.3030351461 -
The
cube root of 20657209802867910700 is 2743830.1259342921
Scales and comparisons
How big is 20657209802867910700?- 20,657,209,802,867,910,700 seconds is equal to 293,274,701,009 years, 3 weeks, 3 days, 15 hours, 30 minutes, 7 seconds.
-
To count from 1 to 20,657,209,802,867,910,700 would take you about two hundred ninety-three billion, two hundred seventy-four million, seven hundred one thousand and nine years!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 20657209802867910700 cubic inches would be around 228652.5 feet tall.
Recreational maths with 20657209802867910700
- 20657209802867910700 backwards is 00701976820890275602
- The number of decimal digits it has is: 20
- The sum of 20657209802867910700's digits is 79
- More coming soon!
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 20657209802867910700 - Facts about the integer". Numbermatics.com. 2024. Web. 14 June 2024.
APA style:
Numbermatics. (2024). Number 20657209802867910700 - Facts about the integer. Retrieved 14 June 2024, from https://numbermatics.com/n/20657209802867910700/
Chicago style:
Numbermatics. 2024. "Number 20657209802867910700 - Facts about the integer". https://numbermatics.com/n/20657209802867910700/
The information we have on file for 20657209802867910700 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
Keywords: Divisors of 20657209802867910700, math, Factors of 20657209802867910700, curriculum, school, college, exams, university, Prime factorization of 20657209802867910700, STEM, science, technology, engineering, physics, economics, calculator, twenty quintillion, six hundred fifty-seven quadrillion, two hundred nine trillion, eight hundred two billion, eight hundred sixty-seven million, nine hundred ten thousand, seven hundred.