21018553920

Names of 21018553920

• Cardinal: 21018553920 can be written as Twenty-one billion, eighteen million, five hundred fifty-three thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.101855392 × 10¹⁰

Factors of 21018553920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 116

Divisors of 21018553920

• Number of divisors d(n): 1680
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 18 19 20 21 24 26 27 28 30 32 35 36 38 39 40 42 45 48 49 52 54 56 57 60 63 64 65 67 70 72 76 78 80 81 84 90 91 95 96 98 104 105 108 112 114 117 120 126 130 133 134 135 140 144 147 152 156 160 162 168 171 180 182 189 190 192 195 196 201 208 210 216 224 228 234 240 245 247 252 260 266 268 270 273 280 285 288 294 304 312 315 320 324 335 336 342 351 360 364 378 380 390 392 399 402 405 416 420 432 441 448 455 456 468 469 480 490 494 504 513 520 532 536 540 546 560 567 570 576 585 588 603 608 624 630 637 648 665 670 672 684 702 720 728 735 741 756 760 780 784 798 804 810 819 832 840 855 864 871 882 910 912 931 936 938 945 960 980 988 1005 1008 1026 1040 1053 1064 1072 1080 1092 1120 1134 1140 1170 1176 1197 1206 1216 1235 1248 1260 1273 1274 1296 1323 1330 1340 1344 1365 1368 1404 1407 1440 1456 1470 1482 1512 1520 1539 1560 1568 1596 1608 1620 1638 1680 1710 1728 1729 1742 1755 1764 1809 1820 1824 1862 1872 1876 1890 1911 1960 1976 1995 2010 2016 2052 2080 2106 2128 2144 2160 2184 2205 2223 2240 2268 2280 2340 2345 2352 2394 2412 2457 2470 2496 2520 2546 2548 2565 2592 2613 2646 2660 2680 2730 2736 2793 2808 2814 2835 2880 2912 2940 2964 3015 3024 3040 3078 3120 3136 3185 3192 3216 3240 3276 3283 3360 3420 3458 3484 3510 3528 3591 3618 3640 3648 3705 3724 3744 3752 3780 3819 3822 3920 3952 3969 3990 4020 4032 4095 4104 4160 4212 4221 4256 4288 4320 4355 4368 4410 4446 4536 4560 4655 4680 4690 4704 4788 4824 4914 4940 5040 5092 5096 5130 5184 5187 5226 5265 5292 5320 5360 5427 5460 5472 5586 5616 5628 5670 5733 5824 5880 5928 5985 6030 6048 6080 6097 6156 6240 6365 6370 6384 6432 6480 6552 6566 6615 6669 6720 6840 6916 6968 7020 7035 7056 7182 7236 7280 7371 7410 7448 7488 7504 7560 7638 7644 7695 7839 7840 7904 7938 7980 8040 8190 8208 8379 8424 8442 8512 8640 8645 8710 8736 8820 8892 8911 9045 9072 9120 9310 9360 9380 9408 9555 9576 9648 9828 9849 9880 10080 10184 10192 10260 10374 10452 10530 10584 10640 10720 10773 10854 10920 10944 11115 11172 11232 11256 11340 11457 11466 11760 11856 11970 12060 12096 12103 12194 12285 12312 12480 12663 12730 12740 12768 12864 12960 13065 13104 13132 13230 13338 13680 13832 13936 13965 14040 14070 14112 14364 14472 14560 14742 14820 14896 15008 15120 15276 15288 15390 15561 15678 15680 15808 15876 15960 16080 16380 16415 16416 16549 16758 16848 16884 17199 17290 17420 17472 17640 17784 17822 17955 18090 18144 18240 18291 18620 18720 18760 19095 19110 19152 19296 19656 19698 19760 19845 20007 20160 20368 20384 20520 20748 20904 21060 21105 21168 21280 21440 21546 21708 21840 22230 22344 22464 22512 22680 22914 22932 23517 23520 23712 23940 24120 24206 24388 24570 24624 25137 25326 25460 25480 25536 25920 25935 26130 26208 26264 26460 26676 26733 27135 27360 27664 27872 27930 28080 28140 28224 28665 28728 28944 29120 29484 29547 29640 29792 30016 30240 30485 30552 30576 30780 31122 31356 31752 31920 32160 32760 32830 32832 33098 33345 33516 33696 33768 34371 34398 34580 34840 35280 35568 35644 35910 36180 36288 36309 36582 36855 37240 37440 37520 37989 38190 38220 38304 38592 39195 39312 39396 39520 39690 40014 40736 40768 41040 41496 41808 41895 42120 42210 42336 42560 42679 43092 43416 43680 44460 44555 44688 45024 45360 45828 45864 46683 47034 47040 47424 47880 48240 48412 48776 49140 49245 49248 49647 50274 50652 50920 50960 51597 51870 52260 52416 52528 52920 53352 53466 53865 54270 54720 54873 55328 55744 55860 56160 56280 57285 57330 57456 57888 58968 59094 59280 59584 60480 60515 60970 61104 61152 61560 62244 62377 62712 63315 63504 63840 64320 65520 65660 66196 66690 67032 67392 67536 68742 68796 69160 69680 70551 70560 71136 71288 71820 72360 72618 73164 73710 74480 75040 75411 75978 76380 76440 76608 77805 78390 78624 78792 79040 79380 80028 80199 81472 82080 82745 82992 83616 83790 84240 84420 84672 85358 85995 86184 86832 87360 88641 88920 89110 89376 90048 90720 91455 91656 91728 93366 94068 95760 96480 96824 97552 98280 98490 98496 99294 100035 100548 101304 101840 101920 103113 103194 103740 104520 105056 105840 106704 106932 107730 108540 108927 109746 110656 111720 112320 112560 114570 114660 114912 115776 115843 117585 117936 118188 118560 121030 121940 122208 122304 123120 124488 124754 125424 125685 126630 127008 127680 128037 131040 131320 132392 133380 133665 134064 135072 137484 137592 138320 139360 140049 141102 141120 142272 142576 143640 144720 145236 146328 147420 147735 148941 148960 150080 150822 151956 152760 152880 155610 156780 157248 157584 158760 160056 160398 164160 164619 165490 165984 167232 167580 168480 168840 170716 171855 171990 172368 173664 177282 177840 178220 178752 181440 181545 182910 183312 183456 186732 187131 188136 189945 191520 192960 193648 195104 196560 196980 198588 200070 201096 202608 203680 203840 206226 206388 207480 209040 210112 211680 213395 213408 213864 215460 217080 217854 219492 223440 225120 229140 229320 229824 231686 233415 235170 235872 236376 237120 240597 242060 243880 244416 246240 248235 248976 249508 250848 251370 253260 254016 256074 257985 262080 262640 264784 265923 266760 267330 268128 270144 274365 274968 275184 276640 278720 280098 282204 285152 287280 289440 290472 292656 294840 295470 297882 297920 301644 303912 305520 305760 311220 311885 313560 315168 317520 320112 320796 326781 329238 330980 331968 335160 336960 337680 341432 343710 343980 344736 347328 347529 352755 354564 355680 356440 363090 365820 366624 366912 373464 374262 376272 377055 379890 383040 384111 387296 390208 393120 393960 397176 400140 400995 402192 405216 407360 412452 412776 414960 418080 423360 426790 426816 427728 430920 434160 435708 438984 443205 446823 446880 450240 458280 458640 463372 466830 470340 471744 472752 481194 484120 487760 492480 493857 496470 497952 499016 501696 502740 506520 512148 515565 515970 525280 529568 531846 533520 534660 536256 544635 548730 549936 550368 553280 560196 561393 564408 570304 574560 578880 579215 580944 585312 589680 590940 595764 603288 607824 611040 611520 622440 623770 627120 630336 635040 640185 640224 641592 653562 658476 661960 670320 675360 682864 687420 687960 689472 695058 700245 705510 709128 711360 712880 721791 726180 731640 733248 744705 746928 748524 752544 754110 759780 768222 774592 786240 787920 794352 800280 801990 804384 810432 810901 823095 824904 825552 829920 836160 853580 855456 861840 868320 871416 877968 886410 893646 893760 916560 917280 926744 933660 935655 940680 945504 962388 968240 975520 980343 987714 992940 995904 998032 1005480 1013040 1024296 1031130 1031940 1042587 1050560 1059136 1063692 1067040 1069320 1089270 1097460 1099872 1100736 1120392 1122786 1128816 1149120 1152333 1158430 1161888 1170624 1179360 1181880 1191528 1202985 1206576 1215648 1222080 1244880 1247540 1254240 1270080 1280370 1280448 1283184 1307124 1316952 1323920 1329615 1340469 1340640 1350720 1365728 1374840 1375920 1390116 1400490 1411020 1418256 1425760 1443582 1452360 1463280 1489410 1493856 1497048 1505088 1508220 1519560 1536444 1575840 1588704 1600560 1603980 1608768 1621802 1633905 1646190 1649808 1651104 1659840 1684179 1707160 1710912 1723680 1736640 1737645 1742832 1755936 1772820 1787292 1833120 1834560 1853488 1867320 1871310 1881360 1891008 1920555 1924776 1936480 1951040 1960686 1975428 1985880 1996064 2010960 2026080 2048592 2062260 2063880 2085174 2127384 2134080 2138640 2178540 2194920 2199744 2234115 2240784 2245572 2257632 2304666 2316860 2323776 2358720 2363760 2383056 2405970 2413152 2431296 2432703 2469285 2489760 2495080 2508480 2560740 2566368 2614248 2633904 2647840 2659230 2680938 2681280 2731456 2749680 2751840 2780232 2800980 2806965 2822040 2836512 2851520 2887164 2904720 2926560 2978820 2987712 2994096 3016440 3039120 3072888 3127761 3151680 3177408 3201120 3207960 3243604 3267810 3292380 3299616 3302208 3368358 3414320 3447360 3456999 3475290 3485664 3511872 3545640 3574584 3608955 3666240 3706976 3734640 3742620 3762720 3841110 3849552 3872960 3921372 3950856 3971760 3992128 4021920 4052160 4054505 4097184 4124520 4127760 4170348 4254768 4277280 4357080 4389840 4468230 4481568 4491144 4515264 4609332 4633720 4727520 4766112 4811940 4826304 4865406 4901715 4938570 4979520 4990160 5052537 5121480 5132736 5212935 5228496 5267808 5295680 5318460 5361876 5499360 5503680 5560464 5601960 5613930 5644080 5673024 5761665 5774328 5809440 5853120 5957640 5988192 6032880 6078240 6145776 6255522 6402240 6415920 6487208 6535620 6584760 6599232 6702345 6736716 6828640 6913998 6950580 6971328 7091280 7149168 7217910 7298109 7413952 7469280 7485240 7525440 7682220 7699104 7842744 7901712 7943520 8043840 8109010 8194368 8249040 8255520 8340696 8420895 8509536 8554560 8714160 8779680 8936460 8963136 8982288 9218664 9267440 9383283 9455040 9532224 9623880 9730812 9803430 9877140 9980320 10105074 10242960 10425870 10456992 10535616 10636920 10723752 10998720 11120928 11203920 11227860 11288160 11523330 11548656 11618880 11915280 11976384 12065760 12156480 12163515 12291552 12511044 12831840 12974416 13071240 13169520 13404690 13473432 13657280 13827996 13901160 14182560 14298336 14435820 14596218 14938560 14970480 15364440 15398208 15638805 15685488 15803424 15887040 16218020 16498080 16511040 16681392 16841790 17019072 17284995 17428320 17559360 17872920 17964576 18437328 18534880 18766566 19247760 19461624 19606860 19754280 19960640 20210148 20485920 20851740 20913984 21273840 21447504 21894327 22241856 22407840 22455720 22576320 23046660 23097312 23830560 24131520 24327030 24583104 25022088 25262685 25663680 25948832 26142480 26339040 26809380 26946864 27655992 27802320 28365120 28596672 28871640 29192436 29940960 30728880 31277610 31370976 31606848 32436040 32996160 33362784 33683580 34569990 34856640 35745840 35929152 36490545 36874656 37069760 37533132 38495520 38923248 39213720 39508560 40420296 40971840 41703480 42547680 42895008 43788654 44815680 44911440 46093320 46194624 46916415 47661120 48654060 50044176 50525370 51897664 52284960 52678080 53618760 53893728 55311984 55604640 57743280 58384872 59881920 61457760 62555220 62741952 64872080 65682981 66725568 67367160 69139980 71491680 72981090 73749312 75066264 76991040 77846496 78427440 79017120 80840592 83406960 85095360 85790016 87577308 89822880 92186640 93832830 97308120 100088352 101050740 104569920 107237520 107787456 109471635 110623968 111209280 115486560 116769744 122915520 125110440 129744160 131365962 134734320 138279960 142983360 145962180 150132528 155692992 156854880 158034240 161681184 166813920 175154616 179645760 184373280 187665660 194616240 200176704 202101480 214475040 218943270 221247936 230973120 233539488 250220880 259488320 262731924 269468640 276559920 291924360 300265056 313709760 323362368 328414905 333627840 350309232 368746560 375331320 389232480 404202960 428950080 437886540 467078976 500441760 525463848 538937280 553119840 583848720 600530112 656829810 700618464 750662640 778464960 808405920 875773080 1000883520 1050927696 1106239680 1167697440 1313659620 1401236928 1501325280 1616811840 1751546160 2101855392 2335394880 2627319240 3002650560 3503092320 4203710784 5254638480 7006184640 10509276960 21018553920
• Sum of all divisors σ(n): 100064986560
• Sum of proper divisors (its aliquot sum) s(n): 79046432640
• 21018553920 is an abundant number, because the sum of its proper divisors (79046432640) is greater than itself. Its abundance is 58027878720

Bases of 21018553920

• Binary: 10011100100110011011010111001000000₂
• Hexadecimal: 0x4E4CDAE40
• Base-36: 9NLWK00

Squares and roots of 21018553920

• 21018553920 squared (21018553920²) is 441779608887947366400
• 21018553920 cubed (21018553920³) is 9285568530167832958800396288000
• The square root of 21018553920 is 144977.7704339531
• The cube root of 21018553920 is 2759.7364587683

Scales and comparisons

• 21,018,553,920 seconds is equal to 668 years, 16 weeks, 6 days, 7 hours, 12 minutes.
• To count from 1 to 21,018,553,920 would take you about one thousand, three hundred thirty-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 21018553920 cubic inches would be around 230 feet tall.

Recreational maths with 21018553920

• 21018553920 backwards is 02935581012
• 21018553920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21018553920's digits is 36
• More coming soon!