20721991680

Names of 20721991680

• Cardinal: 20721991680 can be written as Twenty billion, seven hundred twenty-one million, nine hundred ninety-one thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.072199168 × 10¹⁰

Factors of 20721991680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 21
• Sum of prime factors: 93

Divisors of 20721991680

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 23 24 26 30 32 36 39 40 45 46 47 48 52 60 64 65 69 72 78 80 90 92 94 96 104 115 117 120 128 130 138 141 144 156 160 180 184 188 192 195 207 208 230 234 235 240 256 260 276 282 288 299 312 320 345 360 368 376 384 390 414 416 423 460 468 470 480 512 520 552 564 576 585 598 611 624 640 690 705 720 736 752 768 780 828 832 846 897 920 936 940 960 1024 1035 1040 1081 1104 1128 1152 1170 1196 1222 1248 1280 1380 1410 1440 1472 1495 1504 1536 1560 1656 1664 1692 1794 1833 1840 1872 1880 1920 2048 2070 2080 2115 2162 2208 2256 2304 2340 2392 2444 2496 2560 2691 2760 2820 2880 2944 2990 3008 3055 3072 3120 3243 3312 3328 3384 3588 3666 3680 3744 3760 3840 4096 4140 4160 4230 4324 4416 4485 4512 4608 4680 4784 4888 4992 5120 5382 5405 5499 5520 5640 5760 5888 5980 6016 6110 6144 6240 6486 6624 6656 6768 7176 7332 7360 7488 7520 7680 8192 8280 8320 8460 8648 8832 8970 9024 9165 9216 9360 9568 9729 9776 9984 10240 10764 10810 10998 11040 11280 11520 11776 11960 12032 12220 12288 12480 12972 13248 13312 13455 13536 14053 14352 14664 14720 14976 15040 15360 16215 16384 16560 16640 16920 17296 17664 17940 18048 18330 18432 18720 19136 19458 19552 19968 20480 21528 21620 21996 22080 22560 23040 23552 23920 24064 24440 24576 24960 25944 26496 26624 26910 27072 27495 28106 28704 29328 29440 29952 30080 30720 32430 32768 33120 33280 33840 34592 35328 35880 36096 36660 36864 37440 38272 38916 39104 39936 40960 42159 43056 43240 43992 44160 45120 46080 47104 47840 48128 48645 48880 49152 49920 51888 52992 53248 53820 54144 54990 56212 57408 58656 58880 59904 60160 61440 64860 66240 66560 67680 69184 70265 70656 71760 72192 73320 73728 74880 76544 77832 78208 79872 81920 84318 86112 86480 87984 88320 90240 92160 94208 95680 96256 97290 97760 98304 99840 103776 105984 106496 107640 108288 109980 112424 114816 117312 117760 119808 120320 122880 126477 129720 132480 133120 135360 138368 140530 141312 143520 144384 146640 147456 149760 153088 155664 156416 159744 163840 168636 172224 172960 175968 176640 180480 184320 188416 191360 192512 194580 195520 199680 207552 210795 211968 212992 215280 216576 219960 224848 229632 234624 235520 239616 240640 245760 252954 259440 264960 266240 270720 276736 281060 282624 287040 288768 293280 294912 299520 306176 311328 312832 319488 337272 344448 345920 351936 353280 360960 368640 376832 382720 385024 389160 391040 399360 415104 421590 423936 425984 430560 433152 439920 449696 459264 469248 471040 479232 481280 491520 505908 518880 529920 532480 541440 553472 562120 565248 574080 577536 586560 599040 612352 622656 625664 632385 638976 674544 688896 691840 703872 706560 721920 737280 753664 765440 770048 778320 782080 798720 830208 843180 847872 861120 866304 879840 899392 918528 938496 942080 958464 962560 1011816 1037760 1059840 1064960 1082880 1106944 1124240 1130496 1148160 1155072 1173120 1198080 1224704 1245312 1251328 1264770 1277952 1349088 1377792 1383680 1407744 1413120 1443840 1474560 1530880 1540096 1556640 1564160 1597440 1660416 1686360 1695744 1722240 1732608 1759680 1798784 1837056 1876992 1884160 1916928 1925120 2023632 2075520 2119680 2129920 2165760 2213888 2248480 2260992 2296320 2310144 2346240 2396160 2449408 2490624 2502656 2529540 2698176 2755584 2767360 2815488 2826240 2887680 3061760 3113280 3128320 3194880 3320832 3372720 3391488 3444480 3465216 3519360 3597568 3674112 3753984 3768320 3833856 3850240 4047264 4151040 4239360 4331520 4427776 4496960 4592640 4620288 4692480 4792320 4898816 4981248 5005312 5059080 5396352 5511168 5534720 5630976 5652480 5775360 6123520 6226560 6256640 6389760 6641664 6745440 6782976 6888960 6930432 7038720 7195136 7348224 7507968 7700480 8094528 8302080 8478720 8663040 8855552 8993920 9185280 9384960 9584640 9797632 9962496 10010624 10118160 10792704 11022336 11069440 11261952 11304960 11550720 12247040 12453120 12513280 13283328 13490880 13777920 13860864 14077440 14390272 14696448 15015936 16189056 16604160 16957440 17326080 17711104 17987840 18370560 18769920 19169280 19924992 20021248 20236320 21585408 22044672 22138880 22523904 23101440 24494080 24906240 25026560 26566656 26981760 27555840 28154880 28780544 29392896 30031872 32378112 33208320 33914880 34652160 35422208 35975680 36741120 37539840 39849984 40472640 43170816 44089344 44277760 45047808 48988160 49812480 50053120 53133312 53963520 55111680 56309760 57561088 60063744 64756224 66416640 69304320 71951360 73482240 75079680 79699968 80945280 86341632 88178688 88555520 90095616 99624960 100106240 106266624 107927040 110223360 112619520 115122176 129512448 132833280 143902720 146964480 150159360 159399936 161890560 172683264 177111040 180191232 199249920 215854080 220446720 225239040 230244352 259024896 265666560 287805440 300318720 318799872 323781120 345366528 398499840 431708160 440893440 450478080 460488704 518049792 531333120 575610880 647562240 690733056 796999680 863416320 900956160 1036099584 1151221760 1295124480 1381466112 1593999360 1726832640 2072199168 2302443520 2590248960 3453665280 4144398336 5180497920 6907330560 10360995840 20721991680
• Sum of all divisors σ(n): 82441981440
• Sum of proper divisors (its aliquot sum) s(n): 61719989760
• 20721991680 is an abundant number, because the sum of its proper divisors (61719989760) is greater than itself. Its abundance is 40997998080

Bases of 20721991680

• Binary: 10011010011001000001000000000000000₂
• Hexadecimal: 0x4D3208000
• Base-36: 9IPC740

Squares and roots of 20721991680

• 20721991680 squared (20721991680²) is 429400939185989222400
• 20721991680 cubed (20721991680³) is 8898042689196254639142469632000
• The square root of 20721991680 is 143951.3517824685
• The cube root of 20721991680 is 2746.6953883111

Scales and comparisons

• 20,721,991,680 seconds is equal to 658 years, 46 weeks, 3 days, 20 hours, 48 minutes.
• To count from 1 to 20,721,991,680 would take you about one thousand, three hundred seventeen 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 20721991680 cubic inches would be around 228.9 feet tall.

Recreational maths with 20721991680

• 20721991680 backwards is 08619912702
• 20721991680 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 20721991680's digits is 45
• More coming soon!