21057978240

Names of 21057978240

• Cardinal: 21057978240 can be written as Twenty-one billion, fifty-seven million, nine hundred seventy-eight thousand, two hundred forty.

Scientific notation

• Scientific notation: 2.105797824 × 10¹⁰

Factors of 21057978240

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 31270

Divisors of 21057978240

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 27 30 32 36 39 40 45 48 52 54 60 64 65 72 78 80 81 90 96 104 108 117 120 128 130 135 144 156 160 162 180 192 195 208 216 234 240 260 270 288 312 320 324 351 360 384 390 405 416 432 468 480 520 540 576 585 624 640 648 702 720 780 810 832 864 936 960 1040 1053 1080 1152 1170 1248 1296 1404 1440 1560 1620 1664 1728 1755 1872 1920 2080 2106 2160 2340 2496 2592 2808 2880 3120 3240 3456 3510 3744 4160 4212 4320 4680 4992 5184 5265 5616 5760 6240 6480 7020 7488 8320 8424 8640 9360 10368 10530 11232 12480 12960 14040 14976 16848 17280 18720 21060 22464 24960 25920 28080 31247 33696 37440 42120 44928 51840 56160 62494 67392 74880 84240 93741 112320 124988 134784 156235 168480 187482 224640 249976 281223 312470 336960 374964 406211 468705 499952 562446 624940 673920 749928 812422 843669 937410 999904 1124892 1218633 1249880 1406115 1499856 1624844 1687338 1874820 1999808 2031055 2249784 2437266 2499760 2531007 2812230 2999712 3249688 3374676 3655899 3749640 3999616 4062110 4218345 4499568 4874532 4999520 5062014 5624460 5999424 6093165 6499376 6749352 7311798 7499280 8124220 8436690 8999136 9749064 9999040 10124028 10967697 11248920 11998848 12186330 12655035 12998752 13498704 14623596 14998560 16248440 16873380 17998272 18279495 19498128 19998080 20248056 21935394 22497840 24372660 25310070 25997504 26997408 29247192 29997120 32496880 32903091 33746760 35996544 36558990 38996256 40496112 43870788 44995680 48745320 50620140 51995008 53994816 54838485 58494384 59994240 64993760 65806182 67493520 73117980 77992512 80992224 87741576 89991360 97490640 101240280 107989632 109676970 116988768 129987520 131612364 134987040 146235960 155985024 161984448 164515455 175483152 179982720 194981280 202480560 219353940 233977536 259975040 263224728 269974080 292471920 323968896 329030910 350966304 389962560 404961120 438707880 467955072 526449456 539948160 584943840 658061820 701932608 779925120 809922240 877415760 1052898912 1169887680 1316123640 1403865216 1619844480 1754831520 2105797824 2339775360 2632247280 3509663040 4211595648 5264494560 7019326080 10528989120 21057978240
• Sum of all divisors σ(n): 80989191360
• Sum of proper divisors (its aliquot sum) s(n): 59931213120
• 21057978240 is an abundant number, because the sum of its proper divisors (59931213120) is greater than itself. Its abundance is 38873234880

Bases of 21057978240

• Binary: 10011100111001001110011111110000000₂
• Hexadecimal: 0x4E7273F80
• Base-36: 9O9DK00

Squares and roots of 21057978240

• 21057978240 squared (21057978240²) is 443438447556313497600
• 21057978240 cubed (21057978240³) is 9337917179420230807079092224000
• The square root of 21057978240 is 145113.6735114923
• The cube root of 21057978240 is 2761.4608523515

Scales and comparisons

• 21,057,978,240 seconds is equal to 669 years, 30 weeks, 14 hours, 24 minutes.
• To count from 1 to 21,057,978,240 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 21057978240 cubic inches would be around 230.1 feet tall.

Recreational maths with 21057978240

• 21057978240 backwards is 04287975012
• 21057978240 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21057978240's digits is 45
• More coming soon!