21656721654890504

Names of 21656721654890504

• Cardinal: 21656721654890504 can be written as Twenty-one quadrillion, six hundred fifty-six trillion, seven hundred twenty-one billion, six hundred fifty-four million, eight hundred ninety thousand, five hundred four.

Scientific notation

• Scientific notation: 2.1656721654890504 × 10¹⁶

Factors of 21656721654890504

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 4410

Divisors of 21656721654890504

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 7 8 13 14 26 28 49 52 56 61 91 98 104 122 182 196 244 364 392 427 488 637 728 793 854 1274 1586 1708 2548 2989 3172 3416 3721 4327 5096 5551 5978 6344 7442 8654 11102 11956 14884 17308 22204 23912 26047 29768 30289 34616 38857 44408 48373 52094 56251 60578 77714 96746 104188 112502 121156 155428 182329 193492 208376 212023 225004 226981 242312 263947 310856 338611 364658 386984 393757 424046 450008 453962 527894 677222 729316 787514 848092 907924 1055788 1354444 1458632 1575028 1588867 1696184 1815848 1847629 2111576 2370277 2708888 2756299 2950753 3150056 3177734 3431311 3695258 4740554 5512598 5901506 6355468 6862622 7390516 9481108 11025196 11122069 11803012 12710936 12933403 13725244 14781032 16100767 18722929 18962216 20655271 22050392 22244138 23606024 24019177 25866806 27450488 32201534 37445858 41310542 44488276 48038354 51733612 64403068 74891716 82621084 88976552 96076708 103467224 112705369 128806136 131060503 144586897 149783432 165242168 168134239 192153416 209309971 225410738 243398077 262121006 289173794 336268478 418619942 450821476 486796154 524242012 578347588 672536956 788937583 837239884 901642952 917423521 973592308 982146787 1048484024 1142098669 1156695176 1345073912 1465169797 1577875166 1674479768 1703786539 1834847042 1947184616 1964293574 2284197338 2930339594 3155750332 3407573078 3669694084 3928587148 4568394676 5860679188 6311500664 6815146156 6875027509 7339388168 7857174296 7994690683 9136789352 10256188579 11721358376 11926505773 12767908231 13630292312 13750055018 14847282697 15989381366 20512377158 23853011546 25535816462 27500110036 29694565394 31978762732 41024754316 47706023092 48125192563 51071632924 55000220072 55962834781 59389130788 63957525464 69668018809 82049508632 89375357617 95412046184 96250385126 102143265848 103930978879 111925669562 118778261576 139336037618 178750715234 192500770252 207861957758 223851339124 278672075236 357501430468 385001540504 415723915516 447702678248 487676131663 557344150472 625627503319 715002860936 727516852153 831447831032 905684244517 975352263326 1251255006638 1455033704306 1811368489034 1950704526652 2502510013276 2910067408612 3413732921641 3622736978068 3901409053304 4249749147349 5005020026552 5820134817224 6339789711619 6827465843282 7245473956136 8499498294698 12679579423238 13654931686564 16998996589396 25359158846476 27309863373128 29748244031443 33997993178792 44378527981333 50718317692952 55246738915537 59496488062886 88757055962666 110493477831074 118992976125772 177514111925332 208237708220101 220986955662148 237985952251544 355028223850664 386727172408759 416475416440202 441973911324296 773454344817518 832950832880404 1546908689635036 1665901665760808 2707090206861313 3093817379270072 5414180413722626 10828360827445252 21656721654890504
• Sum of all divisors σ(n): 51729273510145560
• Sum of proper divisors (its aliquot sum) s(n): 30072551855255056
• 21656721654890504 is an abundant number, because the sum of its proper divisors (30072551855255056) is greater than itself. Its abundance is 8415830200364552

Bases of 21656721654890504

• Binary: 1001100111100001010110001110001001111010100000000001000₂
• Hexadecimal: 0x4CF0AC713D4008
• Base-36: 5X8O0KXC748

Squares and roots of 21656721654890504

• 21656721654890504 squared (21656721654890504²) is 469013592837403290236340229374016
• 21656721654890504 cubed (21656721654890504³) is 10157296832439789617268275202764201091760942744064
• The square root of 21656721654890504 is 147162229.0361575897
• The cube root of 21656721654890504 is 278738.8934230907

Scales and comparisons

• 21,656,721,654,890,504 seconds is equal to 688,616,759 years, 51 weeks, 2 days, 7 hours, 21 minutes, 44 seconds.
• To count from 1 to 21,656,721,654,890,504 would take you about two billion, sixty-five million, eight hundred fifty thousand, two hundred seventy-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 21656721654890504 cubic inches would be around 23228.2 feet tall.

Recreational maths with 21656721654890504

• 21656721654890504 backwards is 40509845612765612
• The number of decimal digits it has is: 17
• The sum of 21656721654890504's digits is 71
• More coming soon!