21055985664

Names of 21055985664

• Cardinal: 21055985664 can be written as Twenty-one billion, fifty-five million, nine hundred eighty-five thousand, six hundred sixty-four.

Scientific notation

• Scientific notation: 2.1055985664 × 10¹⁰

Factors of 21055985664

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 989

Divisors of 21055985664

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 17 21 24 28 31 32 34 42 48 51 56 62 64 68 84 93 96 102 112 119 124 128 136 168 186 192 204 217 224 238 248 256 272 336 357 372 384 408 434 448 476 496 512 527 544 651 672 714 744 768 816 868 896 929 952 992 1024 1054 1088 1302 1344 1428 1488 1536 1581 1632 1736 1792 1858 1904 1984 2048 2108 2176 2604 2688 2787 2856 2976 3072 3162 3264 3472 3584 3689 3716 3808 3968 4216 4352 5208 5376 5574 5712 5952 6144 6324 6503 6528 6944 7168 7378 7432 7616 7936 8432 8704 10416 10752 11067 11148 11424 11904 12648 13006 13056 13888 14336 14756 14864 15232 15793 15872 16864 17408 19509 20832 21504 22134 22296 22848 23808 25296 26012 26112 27776 28799 29512 29728 30464 31586 31744 33728 34816 39018 41664 43008 44268 44592 45696 47379 47616 50592 52024 52224 55552 57598 59024 59456 60928 63172 63488 67456 78036 83328 86397 88536 89184 91392 94758 95232 101184 104048 104448 110551 111104 115196 118048 118912 121856 126344 134912 156072 166656 172794 177072 178368 182784 189516 190464 201593 202368 208096 221102 222208 230392 236096 237824 243712 252688 269824 312144 331653 333312 345588 354144 356736 365568 379032 403186 404736 416192 442204 444416 460784 472192 475648 489583 505376 539648 604779 624288 663306 666624 691176 708288 713472 731136 758064 806372 809472 832384 884408 921568 944384 951296 979166 1010752 1079296 1209558 1248576 1326612 1333248 1382352 1416576 1426944 1468749 1516128 1612744 1618944 1664768 1768816 1843136 1888768 1902592 1958332 2021504 2419116 2497152 2653224 2764704 2833152 2853888 2937498 3032256 3225488 3237888 3329536 3427081 3537632 3686272 3777536 3916664 4043008 4838232 4994304 5306448 5529408 5666304 5707776 5874996 6064512 6450976 6659072 6854162 7075264 7372544 7555072 7833328 8086016 9676464 9988608 10281243 10612896 11058816 11332608 11749992 12129024 12901952 13318144 13708324 14150528 14745088 15666656 16172032 19352928 19977216 20562486 21225792 22117632 22665216 23499984 24258048 25803904 27416648 28301056 29490176 31333312 32344064 38705856 39954432 41124972 42451584 44235264 46999968 48516096 51607808 54833296 56602112 58980352 62666624 77411712 82249944 84903168 88470528 93999936 97032192 103215616 109666592 113204224 125333248 154823424 164499888 169806336 176941056 187999872 206431232 219333184 226408448 250666496 309646848 328999776 339612672 375999744 412862464 438666368 501332992 619293696 657999552 679225344 751999488 877332736 1002665984 1238587392 1315999104 1503998976 1754665472 2631998208 3007997952 3509330944 5263996416 7018661888 10527992832 21055985664
• Sum of all divisors σ(n): 70195507200
• Sum of proper divisors (its aliquot sum) s(n): 49139521536
• 21055985664 is an abundant number, because the sum of its proper divisors (49139521536) is greater than itself. Its abundance is 28083535872

Bases of 21055985664

• Binary: 10011100111000010001101100000000000₂
• Hexadecimal: 0x4E708D800
• Base-36: 9O86UIO

Squares and roots of 21055985664

• 21055985664 squared (21055985664²) is 443354532282573520896
• 21055985664 cubed (21055985664³) is 9335266675811293253012180434944
• The square root of 21055985664 is 145106.8077796489
• The cube root of 21055985664 is 2761.3737500649

Scales and comparisons

• 21,055,985,664 seconds is equal to 669 years, 26 weeks, 5 days, 12 hours, 54 minutes, 24 seconds.
• To count from 1 to 21,055,985,664 would take you about one thousand, three hundred thirty-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 21055985664 cubic inches would be around 230.1 feet tall.

Recreational maths with 21055985664

• 21055985664 backwards is 46658955012
• 21055985664 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21055985664's digits is 51
• More coming soon!