21181547691018

Names of 21181547691018

• Cardinal: 21181547691018 can be written as Twenty-one trillion, one hundred eighty-one billion, five hundred forty-seven million, six hundred ninety-one thousand and eighteen.

Scientific notation

• Scientific notation: 2.1181547691018 × 10¹³

Factors of 21181547691018

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 576

Divisors of 21181547691018

• Number of divisors d(n): 864
• Complete list of divisors:
  1 2 3 6 9 11 13 18 22 26 27 29 33 39 54 58 61 66 78 81 87 99 117 122 143 162 169 174 183 198 234 243 261 286 297 319 338 351 366 377 429 457 486 507 522 549 594 638 671 702 754 783 793 841 858 891 914 957 1014 1053 1098 1131 1287 1342 1371 1521 1566 1586 1647 1682 1769 1782 1859 1914 2013 2106 2262 2349 2379 2523 2574 2673 2742 2871 3042 3159 3294 3393 3538 3718 3861 4026 4113 4147 4563 4698 4758 4901 4941 5027 5046 5307 5346 5577 5742 5941 6039 6318 6786 7047 7137 7569 7722 8226 8294 8613 8723 9126 9251 9802 9882 10054 10179 10309 10614 10933 11154 11583 11882 12078 12339 12441 13253 13689 14094 14274 14703 14823 15081 15138 15921 16731 17226 17446 17823 18117 18502 19459 20358 20618 21411 21866 22707 22997 23166 24678 24882 25839 26169 26506 27378 27753 27877 29406 29646 30162 30537 30927 31842 32799 33462 34749 35646 36234 37017 37323 38918 39759 41067 42822 44109 45243 45414 45994 47763 50193 51301 51678 52338 53469 53911 54351 55506 55754 58377 61074 61854 64233 65351 65598 68121 68991 69498 74034 74646 77233 77517 78507 79518 82134 83259 83631 88218 90486 91611 92781 95526 98397 100386 102602 106938 107822 108702 111051 111969 113399 116754 119277 120263 128466 130702 132327 135729 136242 137982 142129 143289 145783 150579 153903 154466 155034 157014 160407 161733 163053 166518 167262 172289 175131 183222 185562 192699 196053 196794 204363 206973 222102 223938 226798 231699 235521 238554 240526 249777 250893 252967 264654 271458 278343 284258 286578 291566 295191 298961 301158 306647 307806 320814 323466 326106 335907 340197 344578 350262 357831 360789 362401 384337 385398 392106 396981 407187 408726 413946 426387 429867 437349 451737 461709 463398 471042 481221 485199 499554 501786 505934 516867 525393 556686 564311 588159 590382 597922 613294 620919 666913 671814 680394 695097 706563 715662 721578 724802 749331 752679 758901 768674 793962 808433 814374 835029 849563 852774 859734 874698 885573 896883 903474 919941 923418 962442 970398 1007721 1020591 1033734 1050786 1073493 1082367 1087203 1128622 1153011 1176318 1190943 1221561 1241838 1279161 1312047 1333826 1385127 1390194 1413126 1443663 1455597 1498662 1505358 1517802 1550601 1563419 1576179 1616866 1670058 1692933 1699126 1764477 1771146 1793766 1839882 1862757 1895179 2000739 2015442 2041182 2085291 2119689 2146986 2164734 2174406 2239757 2247993 2258037 2276703 2306022 2381886 2425299 2443122 2505087 2548689 2558322 2624094 2656719 2690649 2759823 2770254 2887326 2911194 3061773 3101202 3126838 3152358 3220479 3247101 3261609 3288571 3385866 3459033 3528954 3725514 3790358 3837483 3936141 3986411 4001478 4155381 4170582 4227707 4239378 4366791 4479514 4495986 4516074 4553406 4651803 4690257 4711213 4728537 4850598 4996381 5010174 5078799 5097378 5293431 5313438 5381298 5519646 5588271 5685537 6002217 6123546 6255873 6440958 6494202 6523218 6577142 6719271 6774111 6830109 6918066 7275897 7336043 7646067 7674966 7872282 7972822 8071947 8279469 8310762 8455414 8669869 8733582 8892763 9185319 9303606 9380514 9422426 9457074 9741303 9784827 9865713 9992762 10157598 10377099 10509629 10586862 11176542 11371074 11512449 11808423 11959233 12004434 12466143 12511746 12683121 13100373 13438542 13548222 13660218 13955409 14070771 14133639 14551794 14672086 14989143 15236397 15292134 15880293 16143894 16558938 17056611 17339738 17785526 18006651 18370638 18767619 19482606 19569654 19731426 20157813 20490327 20754198 21019258 21827691 22008129 22938201 23024898 23444557 23616846 23918466 24215841 24637327 24838407 24932286 25366242 26009607 26200746 26678289 27555957 27910818 28141542 28267278 29223909 29354481 29597139 29978286 30472794 31131297 31528887 31760586 34113222 34537347 35425269 35877699 36013302 37535238 38049363 40315626 40980654 41866227 42212313 42400917 43655382 44016258 44967429 45709191 45876402 46889114 48431682 49274654 49676814 51169833 51823343 52019214 53356578 54019953 54960191 55111914 58447818 58708962 59194278 60473439 61470981 62262594 63057774 64952953 65483073 66024387 68814603 69074694 70333671 70850538 71755398 72647523 73911981 74515221 76098726 78028821 80034867 83732454 84424626 84801834 88063443 88791417 89934858 91418382 93393891 94586661 95368559 102339666 103646686 107633097 108039906 109920382 114148089 115605919 120946878 122941962 126636939 127202751 129905906 130966146 132048774 134902287 136625177 137127573 137629206 140667342 145295046 147823962 149030442 153509499 155470029 156057642 160069734 162059859 164880573 176126886 177582834 181420317 186787782 189173322 190737118 194858859 196449219 198073161 206443809 211001013 215266194 221735943 228296178 231211838 234086463 240104601 253273878 254405502 257890127 266374251 269804574 273250354 274255146 283759983 286105677 304779241 307018998 310940058 322899291 324119718 329761146 342444267 346817757 362840634 379910817 381608253 389717718 392898438 396146322 404706861 409875531 412887618 422002026 443471886 460528497 466410087 468172926 480209202 494641719 515780254 532748502 544260951 567519966 572211354 584576577 594219483 609558482 633003039 645798582 665207829 684888534 693635514 702259389 714482483 720313803 759821634 763216506 773670381 799122753 809413722 819751062 851279949 858317031 914337723 921056994 932820174 968697873 989283438 1027332801 1040453271 1088521902 1144824759 1169153154 1188438966 1214120583 1229626593 1266006078 1330415658 1399230261 1404518778 1428964966 1440627606 1483925157 1502876947 1547340762 1598245506 1702559898 1716634062 1753729731 1782658449 1828675446 1899009117 1937395746 1995623487 2054665602 2080906542 2106778167 2143447449 2160941409 2289649518 2321011143 2428241166 2459253186 2553839847 2574951093 2743013169 2798460522 2967850314 3005753894 3121359813 3352571651 3507459462 3565316898 3688879779 3798018234 3962130133 3991246974 4197690783 4213556334 4286894898 4321882818 4451775471 4508630841 4642022286 5107679694 5149902186 5261189193 5486026338 5697027351 5986870461 6242719626 6430342347 6705143302 6963033429 7377759558 7724853279 7924260266 8229039507 8395381566 8903550942 9017261682 9364079439 10057714953 10522378386 11066639337 11394054702 11886390399 11973740922 12593072349 12860684694 13355326413 13525892523 13926066858 15449706558 15783567579 16458079014 18728158878 19291027041 20115429906 20889100287 22133278674 23174559837 23772780798 24687118521 25186144698 26710652826 27051785046 28092238317 30173144859 31567135158 33199918011 35659171197 38582054082 40577677569 41778200574 43583431463 46349119674 49374237042 56184476634 57873081123 60346289718 62667300861 66399836022 71318342394 74061355563 81155355138 87166862926 90519434577 106977513591 115746162246 121733032707 125334601722 130750294389 148122711126 173619243369 181038869154 213955027182 243466065414 261500588778 271558303731 320932540773 347238486738 365199098121 392250883167 543116607462 641865081546 730398196242 784501766334 814674911193 962797622319 1176752649501 1629349822386 1925595244638 2353505299002 3530257948503 7060515897006 10590773845509 21181547691018
• Sum of all divisors σ(n): 59310324021312
• Sum of proper divisors (its aliquot sum) s(n): 38128776330294
• 21181547691018 is an abundant number, because the sum of its proper divisors (38128776330294) is greater than itself. Its abundance is 16947228639276

Bases of 21181547691018

• Binary: 100110100001110110110101000000011110000001010₂
• Hexadecimal: 0x1343B6A03C0A
• Base-36: 7IAO2LQMI

Squares and roots of 21181547691018

• 21181547691018 squared (21181547691018²) is 448657962586869967197876324
• 21181547691018 cubed (21181547691018³) is 9503270031488755783943986650135329657832
• The square root of 21181547691018 is 4602341.5443682577
• The cube root of 21181547691018 is 27668.5179267597

Scales and comparisons

• 21,181,547,691,018 seconds is equal to 673,507 years, 36 weeks, 1 day, 23 hours, 30 minutes, 18 seconds.
• To count from 1 to 21,181,547,691,018 would take you about one million, six hundred eighty-three thousand, seven hundred sixty-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 21181547691018 cubic inches would be around 2305.7 feet tall.

Recreational maths with 21181547691018

• 21181547691018 backwards is 81019674518112
• 21181547691018 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21181547691018's digits is 54
• More coming soon!