866489024593920
866,489,024,593,920 is an even composite number composed of seven prime numbers multiplied together.
What does the number 866489024593920 look like?
This visualization shows the relationship between its 7 prime factors (large circles) and 2160 divisors.
866489024593920 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two thousand, one hundred sixty divisors.
Prime factorization of 866489024593920:
214 × 3 × 5 × 7 × 132 × 532 × 1061
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 7 × 13 × 13 × 53 × 53 × 1061)See below for interesting mathematical facts about the number 866489024593920 from the Numbermatics database.
Names of 866489024593920
- Cardinal: 866489024593920 can be written as Eight hundred sixty-six trillion, four hundred eighty-nine billion, twenty-four million, five hundred ninety-three thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 8.6648902459392 × 1014
Factors of 866489024593920
Divisors of 866489024593920
- Number of divisors d(n): 2160
-
Complete list of divisors:
1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 32 35 39 40 42 48 52 53 56 60 64 65 70 78 80 84 91 96 104 105 106 112 120 128 130 140 156 159 160 168 169 182 192 195 208 210 212 224 240 256 260 265 273 280 312 318 320 336 338 364 371 384 390 416 420 424 448 455 480 507 512 520 530 546 560 624 636 640 672 676 689 728 742 768 780 795 832 840 845 848 896 910 960 1014 1024 1040 1060 1061 1092 1113 1120 1183 1248 1272 1280 1344 1352 1365 1378 1456 1484 1536 1560 1590 1664 1680 1690 1696 1792 1820 1855 1920 2028 2048 2067 2080 2120 2122 2184 2226 2240 2366 2496 2535 2544 2560 2688 2704 2730 2756 2809 2912 2968 3072 3120 3180 3183 3328 3360 3380 3392 3445 3549 3584 3640 3710 3840 4056 4096 4134 4160 4240 4244 4368 4452 4480 4732 4823 4992 5070 5088 5120 5305 5376 5408 5460 5512 5565 5618 5824 5915 5936 6144 6240 6360 6366 6656 6720 6760 6784 6890 7098 7168 7280 7420 7427 7680 8112 8192 8268 8320 8427 8480 8488 8736 8904 8957 8960 9464 9646 9984 10140 10176 10240 10335 10610 10752 10816 10920 11024 11130 11236 11648 11830 11872 12288 12480 12720 12732 13312 13440 13520 13568 13780 13793 14045 14196 14336 14469 14560 14840 14854 15360 15915 16224 16384 16536 16640 16854 16960 16976 17472 17745 17808 17914 17920 18928 19292 19663 19968 20280 20352 20480 20670 21220 21504 21632 21840 22048 22260 22281 22472 23296 23660 23744 24115 24576 24960 25440 25464 26624 26871 26880 27040 27136 27560 27586 28090 28392 28672 28938 29120 29680 29708 30720 31830 32448 33072 33280 33708 33920 33952 34944 35490 35616 35828 35840 36517 37135 37856 38584 39326 39936 40560 40704 40960 41340 41379 42135 42440 43008 43264 43680 44096 44520 44562 44785 44944 46592 47320 47488 48230 49152 49920 50880 50928 53248 53742 53760 54080 54272 55120 55172 56180 56233 56784 57344 57876 58240 58989 59360 59416 61440 62699 63660 64896 66144 66560 67416 67840 67904 68965 69888 70980 71232 71656 71680 72345 73034 74270 75712 77168 78652 79872 81120 81408 81920 82680 82758 84270 84880 86016 86528 87360 88192 89040 89124 89570 89888 93184 94640 94976 96460 96551 98315 99840 101760 101856 106496 107484 107520 108160 108544 109551 110240 110344 111405 112360 112466 113568 114688 115752 116480 117978 118720 118832 122880 125398 127320 129792 132288 133120 134355 134832 135680 135808 137930 139776 141960 142464 143312 143360 144690 146068 148540 151424 154336 157304 159744 162240 162816 165360 165516 168540 168699 169760 172032 173056 174720 176384 178080 178248 179140 179309 179776 182585 186368 188097 189280 189952 192920 193102 196630 199680 203520 203712 206895 212992 214968 215040 216320 217088 219102 220480 220688 222810 224720 224932 227136 231504 232960 235956 237440 237664 245760 250796 254640 255619 259584 264576 266240 268710 269664 271360 271616 275860 279552 281165 283920 284928 286624 286720 289380 289653 292136 294945 297080 302848 308672 313495 314608 319488 324480 325632 330720 331032 337080 337398 339520 344064 346112 349440 352768 356160 356496 358280 358618 359552 365170 372736 376194 378560 379904 385840 386204 393260 393631 399360 407040 407424 413790 429936 430080 432640 434176 438204 440960 441376 445620 449440 449864 454272 463008 465920 471912 474721 474880 475328 482755 501592 509280 511238 519168 529152 532480 537420 537927 539328 542720 543232 547755 551720 559104 562330 567840 569856 573248 573440 578760 579306 584272 589890 594160 605696 617344 626990 629216 638976 648960 651264 661440 662064 674160 674796 679040 692224 698880 705536 712320 712992 716560 717236 719104 730340 731029 745472 752388 757120 759808 766857 771680 772408 786520 787262 798720 814080 814848 827580 843495 859872 860160 865280 868352 876408 881920 882752 891240 896545 898880 899728 908544 926016 931840 940485 943824 949442 949760 950656 965510 1003184 1018560 1022476 1038336 1058304 1064960 1074840 1075854 1078656 1085440 1086464 1095510 1103440 1118208 1124660 1135680 1139712 1146496 1157520 1158612 1168544 1179780 1180893 1188320 1211392 1234688 1253980 1255163 1258432 1278095 1297920 1302528 1322880 1324128 1348320 1349592 1358080 1384448 1397760 1411072 1424163 1424640 1425984 1433120 1434472 1438208 1448265 1460680 1462058 1490944 1504776 1514240 1519616 1533714 1543360 1544816 1573040 1574524 1597440 1628160 1629696 1655160 1686990 1719744 1720320 1730560 1752816 1763840 1765504 1782480 1793090 1797760 1799456 1817088 1852032 1863680 1880970 1887648 1898884 1899520 1901312 1931020 1968155 2006368 2037120 2044952 2076672 2116608 2149680 2151708 2157312 2170880 2172928 2191020 2193087 2206880 2236416 2249320 2271360 2279424 2292992 2315040 2317224 2337088 2359560 2361786 2373605 2376640 2422784 2469376 2507960 2510326 2516864 2556190 2595840 2605056 2645760 2648256 2689635 2696640 2699184 2716160 2768896 2795520 2822144 2848326 2849280 2851968 2866240 2868944 2876416 2896530 2921360 2924116 2980349 3009552 3028480 3039232 3067428 3086720 3089632 3146080 3149048 3194880 3256320 3259392 3310320 3323047 3373980 3439488 3461120 3505632 3527680 3531008 3564960 3586180 3595520 3598912 3634176 3655145 3704064 3727360 3761940 3765489 3775296 3797768 3799040 3802624 3834285 3862040 3936310 4012736 4074240 4089904 4153344 4233216 4299360 4303416 4314624 4341760 4345856 4382040 4386174 4413760 4472832 4498640 4542720 4558848 4585984 4630080 4634448 4674176 4719120 4723572 4747210 4753280 4845568 4938752 5015920 5020652 5033728 5112380 5117203 5191680 5291520 5296512 5379270 5393280 5398368 5432320 5591040 5644288 5696652 5698560 5703936 5732480 5737888 5752832 5793060 5842720 5848232 5904465 5960698 6019104 6056960 6078464 6134856 6173440 6179264 6275815 6292160 6298096 6512640 6518784 6620640 6646094 6747960 6878976 6922240 7011264 7055360 7062016 7120815 7129920 7172360 7191040 7197824 7268352 7310290 7408128 7454720 7523880 7530978 7550592 7595536 7598080 7605248 7668570 7724080 7872620 8025472 8148480 8179808 8306688 8466432 8598720 8606832 8629248 8691712 8764080 8772348 8827520 8941047 8997280 9085440 9117696 9171968 9260160 9268896 9348352 9438240 9447144 9494420 9503377 9506560 9691136 9877504 9969141 10031840 10041304 10067456 10224760 10234406 10383360 10583040 10593024 10758540 10786560 10796736 10864640 10965435 11182080 11288576 11393304 11397120 11407872 11464960 11475776 11505664 11586120 11685440 11696464 11808930 11921396 12038208 12113920 12269712 12346880 12358528 12551630 12584320 12596192 13025280 13037568 13241280 13292188 13495920 13757952 13844480 14022528 14110720 14124032 14241630 14259840 14344720 14382080 14395648 14536704 14620580 14816256 14901745 15047760 15061956 15101184 15191072 15196160 15210496 15337140 15351609 15448160 15745240 16050944 16296960 16359616 16615235 16932864 17197440 17213664 17258496 17383424 17528160 17544696 17655040 17882094 17994560 18170880 18235392 18343936 18520320 18537792 18696704 18827445 18876480 18894288 18988840 19006754 19013120 19382272 19755008 19938282 20063680 20082608 20134912 20449520 20468812 20766720 20862443 21166080 21186048 21517080 21573120 21593472 21729280 21930870 22364160 22786608 22794240 22815744 22929920 22951552 23011328 23172240 23370880 23392928 23617860 23842792 24076416 24227840 24539424 24693760 24717056 25103260 25168640 25192384 25586015 26075136 26482560 26584376 26991840 27515904 28045056 28221440 28248064 28483260 28510131 28519680 28689440 28764160 28791296 29073408 29241160 29632512 29803490 30095520 30123912 30202368 30382144 30392320 30420992 30674280 30703218 30896320 31490480 32101888 32593920 32719232 33230470 33865728 34394880 34427328 34516992 35056320 35089392 35310080 35764188 35989120 36341760 36687872 37040640 37075584 37393408 37654890 37752960 37788576 37977680 38013508 38026240 38744537 39510016 39876564 40127360 40165216 40269824 40899040 40937624 41533440 41724886 42332160 42372096 43034160 43146240 43186944 43458560 43861740 44705235 45573216 45588480 45631488 45859840 45903104 46022656 46344480 46741760 46785856 47235720 47516885 47685584 48152832 48455680 49078848 49387520 49434112 49845705 50206520 50337280 50384768 51172030 52150272 52965120 53168752 53983680 55031808 56090112 56442880 56496128 56966520 57020262 57039360 57378880 57528320 57582592 58146816 58482320 59265024 59606980 60191040 60247824 60404736 60764288 60841984 61348560 61406436 61792640 62587329 62980960 64203776 65187840 65438464 66460940 66523639 68789760 68854656 69033984 70112640 70178784 70620160 71528376 71978240 72683520 73375744 74081280 74151168 74786816 75309780 75505920 75577152 75955360 76027016 76052480 76758045 77489074 79020032 79753128 80254720 80330432 80539648 81798080 81875248 83449772 84664320 84744192 86068320 86292480 86373888 86917120 87723480 89410470 91146432 91176960 91262976 91719680 91806208 92688960 93483520 93571712 94471440 95033770 95371168 96305664 96911360 98157696 98775040 98868224 99691410 100413040 100674560 100769536 102344060 104312215 105930240 106337504 107967360 110063616 112180224 112992256 113933040 114040524 114078720 114757760 115056640 115165184 116233611 116964640 118530048 119213960 120382080 120495648 120809472 121528576 121683968 122697120 122812872 123585280 125174658 125961920 128407552 130375680 130876928 132921880 133047278 137579520 137709312 138067968 140225280 140357568 141240320 142550655 143056752 143956480 145367040 146751488 148162560 148302336 149573632 150619560 151011840 151154304 151910720 152054032 152104960 153516090 154978148 159506256 160509440 160660864 161079296 163596160 163750496 166899544 169328640 169488384 172136640 172584960 172747776 175446960 178820940 182292864 182525952 183439360 183612416 185377920 186967040 187143424 188942880 190067540 190742336 192611328 193722685 196315392 197550080 197736448 199382820 199570917 200826080 201349120 201539072 204688120 208624430 211860480 212675008 215934720 220127232 224360448 225984512 227866080 228081048 228157440 229515520 230113280 230330368 232467222 233929280 237060096 238427920 240764160 240991296 241618944 243057152 245394240 245625744 247170560 250349316 251923840 256815104 260751360 261753856 265843760 266094556 271211759 275159040 275418624 280450560 280715136 282480640 285101310 286113504 287912960 290734080 296325120 296604672 299147264 301239120 302023680 302308608 303821440 304108064 304209920 307032180 309956296 312936645 319012512 321018880 321321728 322158592 327192320 327500992 332618195 333799088 338976768 344273280 345169920 345495552 350893920 357641880 364585728 365051904 366878720 367224832 370755840 373934080 374286848 377885760 380135080 381484672 385222656 387445370 392630784 395100160 395472896 398765640 399141834 401652160 402698240 403078144 409376240 417248860 423720960 425350016 431869440 440254464 448720896 455732160 456162096 456314880 459031040 460660736 464934444 467858560 476855840 481528320 481982592 483237888 486114304 490788480 491251488 494341120 500698632 503678981 503847680 513630208 523507712 531687520 532189112 542423518 550318080 550837248 560901120 561430272 564961280 570202620 572227008 575825920 581168055 592650240 593209344 598294528 602478240 604047360 604617216 607642880 608216128 608419840 614064360 619912592 625873290 638025024 642037760 642643456 654384640 655001984 665236390 667598176 677953536 688546560 690339840 690991104 701787840 715283760 729171456 733757440 734449664 741511680 747868160 748573696 755771520 760270160 762969344 770445312 774890740 785261568 790945792 797531280 798283668 803304320 805396480 806156288 813635277 818752480 834497720 847441920 850700032 863738880 897441792 911464320 912324192 912629760 918062080 921321472 929868888 935717120 953711680 963056640 963965184 966475776 972228608 981576960 982502976 988682240 997854585 1001397264 1007357962 1007695360 1027260416 1047015424 1063375040 1064378224 1084847036 1100636160 1101674496 1121802240 1122860544 1129922560 1140405240 1144454016 1151651840 1162336110 1185300480 1186418688 1204956480 1208094720 1209234432 1215285760 1216432256 1228128720 1239825184 1251746580 1276050048 1284075520 1285286912 1308769280 1310003968 1330472780 1335196352 1356058795 1377093120 1381982208 1403575680 1430567520 1458342912 1468899328 1483023360 1495736320 1497147392 1511036943 1511543040 1520540320 1525938688 1540890624 1549781480 1570523136 1581891584 1595062560 1596567336 1606608640 1610792960 1612312576 1627270554 1637504960 1668995440 1694883840 1701400064 1727477760 1794883584 1822928640 1824648384 1825259520 1836124160 1859737776 1871434240 1907423360 1926113280 1927930368 1944457216 1963153920 1965005952 1977364480 1995709170 2002794528 2014715924 2015390720 2094030848 2126750080 2128756448 2169694072 2201272320 2203348992 2243604480 2245721088 2280810480 2288908032 2303303680 2324672220 2372837376 2409912960 2416189440 2418468864 2430571520 2432864512 2456257440 2479650368 2503493160 2518394905 2552100096 2568151040 2570573824 2617538560 2620007936 2660945560 2670392704 2712117590 2754186240 2763964416 2807151360 2861135040 2916685824 2937798656 2966046720 2991472640 2994294784 3022073886 3023086080 3041080640 3051877376 3081781248 3099562960 3141046272 3190125120 3193134672 3213217280 3224625152 3254541108 3275009920 3337990880 3389767680 3402800128 3454955520 3525752867 3645857280 3649296768 3672248320 3719475552 3742868480 3814846720 3852226560 3855860736 3888914432 3926307840 3930011904 3954728960 3991418340 4005589056 4029431848 4030781440 4068176385 4188061696 4253500160 4257512896 4339388144 4406697984 4487208960 4491442176 4561620960 4577816064 4606607360 4649344440 4745674752 4819825920 4832378880 4836937728 4861143040 4865729024 4912514880 4959300736 5006986320 5036789810 5104200192 5136302080 5141147648 5235077120 5240015872 5321891120 5340785408 5424235180 5508372480 5614302720 5722270080 5833371648 5932093440 5988589568 6044147772 6046172160 6082161280 6103754752 6199125920 6282092544 6380250240 6386269344 6426434560 6449250304 6509082216 6550019840 6675981760 6805600256 6909911040 7051505734 7291714560 7298593536 7344496640 7438951104 7485736960 7555184715 7629693440 7704453120 7711721472 7777828864 7852615680 7860023808 7909457920 7982836680 8011178112 8058863696 8061562880 8136352770 8507000320 8515025792 8678776288 8813395968 8974417920 8982884352 9123241920 9155632128 9298688880 9639651840 9673875456 9722286080 9731458048 9825029760 9918601472 10013972640 10073579620 10208400384 10282295296 10470154240 10480031744 10577258601 10643782240 10681570816 10848470360 11016744960 11228605440 11444540160 11666743296 11864186880 11977179136 12088295544 12092344320 12164322560 12207509504 12398251840 12564185088 12760500480 12772538688 12852869120 13018164432 13100039680 13351963520 13611200512 13819822080 14103011468 14583429120 14597187072 14688993280 14877902208 14971473920 15110369430 15259386880 15408906240 15423442944 15705231360 15720047616 15965673360 16022356224 16117727392 16123125760 16272705540 17014000640 17030051584 17357552576 17628764335 17965768704 18246483840 18311264256 18597377760 19279303680 19347750912 19444572160 19462916096 19650059520 19837202944 20027945280 20147159240 20416800768 20564590592 20940308480 20960063488 21154517202 21287564480 21363141632 21696940720 22033489920 22457210880 22889080320 23333486592 23728373760 24176591088 24184688640 24328645120 24415019008 24796503680 25521000960 25545077376 25705738240 26036328864 26200079360 26703927040 27222401024 28206022936 29166858240 29194374144 29755804416 29942947840 30220738860 30518773760 30846885888 31410462720 31440095232 31931346720 32044712448 32235454784 32246251520 32545411080 34028001280 34060103168 34715105152 35257528670 35931537408 36492967680 36622528512 37194755520 38558607360 38889144320 38925832192 39300119040 39674405888 40055890560 40294318480 40833601536 41920126976 42309034404 42575128960 42726283264 43393881440 44066979840 44914421760 45778160640 48353182176 48369377280 48657290240 48830038016 49593007360 51042001920 51090154752 51411476480 52072657728 52400158720 52886293005 53407854080 54444802048 56412045872 58333716480 58388748288 59511608832 59885895680 60441477720 61037547520 61693771776 62820925440 62880190464 63862693440 64089424896 64470909568 65090822160 68056002560 68120206336 69430210304 70515057340 72985935360 73245057024 74389511040 77117214720 77851664384 78600238080 79348811776 80111781120 80588636960 81667203072 83840253952 84618068808 85150257920 85452566528 86787762880 89828843520 91556321280 96706364352 96738754560 97314580480 99186014720 102084003840 102180309504 102822952960 104145315456 104800317440 105772586010 106815708160 112824091744 116667432960 116777496576 119023217664 120882955440 122075095040 125760380928 127725386880 128178849792 128941819136 130181644320 136112005120 136240412672 138860420608 141030114680 145971870720 146490114048 148779022080 154234429440 155703328768 157200476160 158697623552 160223562240 161177273920 163334406144 169236137616 170300515840 170905133056 173575525760 179657687040 183112642560 193412728704 194629160960 198372029440 204168007680 204360619008 208290630912 209600634880 211545172020 213631416320 225648183488 233554993152 238046435328 241765910880 244150190080 251520761856 255450773760 256357699584 257883638272 260363288640 272224010240 272480825344 277720841216 282060229360 291943741440 297558044160 308468858880 314400952320 317395247104 320447124480 322354547840 338472275232 340601031680 341810266112 347151051520 366225285120 386825457408 389258321920 396744058880 408336015360 408721238016 416581261824 419201269760 423090344040 427262832640 451296366976 467109986304 476092870656 483531821760 510901547520 512715399168 515767276544 520726577280 544961650688 555441682432 564120458720 583887482880 595116088320 628801904640 634790494208 640894248960 644709095680 676944550464 681202063360 694302103040 732450570240 773650914816 778516643840 793488117760 816672030720 817442476032 833162523648 846180688080 854525665280 902592733952 952185741312 967063643520 1021803095040 1025430798336 1031534553088 1041453154560 1089923301376 1110883364864 1128240917440 1167774965760 1190232176640 1257603809280 1281788497920 1289418191360 1353889100928 1362404126720 1388604206080 1547301829632 1586976235520 1634884952064 1666325047296 1692361376160 1709051330560 1805185467904 1904371482624 1934127287040 2043606190080 2063069106176 2082906309120 2221766729728 2256481834880 2335549931520 2380464353280 2563576995840 2578836382720 2707778201856 2724808253440 2777208412160 3094603659264 3173952471040 3269769904128 3332650094592 3384722752320 3610370935808 3868254574080 4087212380160 4126138212352 4165812618240 4443533459456 4512963669760 4760928706560 5127153991680 5157672765440 5415556403712 5449616506880 5554416824320 6189207318528 6665300189184 6769445504640 7220741871616 7736509148160 8174424760320 8252276424704 8331625236480 9025927339520 9521857413120 10315345530880 10831112807424 11108833648640 12378414637056 13330600378368 13538891009280 14441483743232 15473018296320 16348849520640 16663250472960 18051854679040 20630691061760 21662225614848 22217667297280 24756829274112 27077782018560 28882967486464 30946036592640 33326500945920 36103709358080 41261382123520 43324451229696 54155564037120 57765934972928 61892073185280 66653001891840 72207418716160 86648902459392 108311128074240 123784146370560 144414837432320 173297804918784 216622256148480 288829674864640 433244512296960 866489024593920
- Sum of all divisors σ(n): 3500538546943872
- Sum of proper divisors (its aliquot sum) s(n): 2634049522349952
- 866489024593920 is an abundant number, because the sum of its proper divisors (2634049522349952) is greater than itself. Its abundance is 1767560497756032
Bases of 866489024593920
- Binary: 110001010000010001001100101000001101000000000000002
- Hexadecimal: 0x3141132834000
- Base-36: 8J57K95QTC
Squares and roots of 866489024593920
- 866489024593920 squared (8664890245939202) is 750803229741722898620900966400
- 866489024593920 cubed (8664890245939203) is 650562758200870300712679488325518295564288000
-
The
square root of 866489024593920 is 29436185.6325496085 -
The
cube root of 866489024593920 is 95335.4356229145
Scales and comparisons
How big is 866489024593920?- 866,489,024,593,920 seconds is equal to 27,551,670 years, 39 weeks, 2 days, 32 minutes.
-
To count from 1 to 866,489,024,593,920 would take you about sixty-eight million, eight hundred seventy-nine thousand, one hundred seventy-six 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 866489024593920 cubic inches would be around 7944.6 feet tall.
Recreational maths with 866489024593920
- 866489024593920 backwards is 029395420984668
- The number of decimal digits it has is: 15
- The sum of 866489024593920's digits is 75
- 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 866489024593920 - Facts about the integer". Numbermatics.com. 2024. Web. 13 May 2024.
APA style:
Numbermatics. (2024). Number 866489024593920 - Facts about the integer. Retrieved 13 May 2024, from https://numbermatics.com/n/866489024593920/
Chicago style:
Numbermatics. 2024. "Number 866489024593920 - Facts about the integer". https://numbermatics.com/n/866489024593920/
The information we have on file for 866489024593920 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 866489024593920, math, Factors of 866489024593920, curriculum, school, college, exams, university, Prime factorization of 866489024593920, STEM, science, technology, engineering, physics, economics, calculator, eight hundred sixty-six trillion, four hundred eighty-nine billion, twenty-four million, five hundred ninety-three thousand, nine hundred twenty.