21518184380

Names of 21518184380

• Cardinal: 21518184380 can be written as Twenty-one billion, five hundred eighteen million, one hundred eighty-four thousand, three hundred eighty.

Scientific notation

• Scientific notation: 2.151818438 × 10¹⁰

Factors of 21518184380

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3464

Divisors of 21518184380

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 5 7 10 11 14 19 20 22 28 31 35 38 44 49 55 62 70 76 77 95 98 110 124 133 140 154 155 190 196 209 217 220 245 266 308 310 341 380 385 418 434 490 532 539 589 620 665 682 770 836 868 931 980 1045 1078 1085 1178 1330 1364 1463 1519 1540 1705 1862 2090 2156 2170 2356 2387 2660 2695 2926 2945 3038 3389 3410 3724 4123 4180 4340 4655 4774 5390 5852 5890 6076 6479 6778 6820 7315 7595 8246 9310 9548 10241 10780 11780 11935 12958 13556 14630 15190 16492 16709 16945 18620 20482 20615 23723 23870 25916 28861 29260 30380 32395 33418 33890 37279 40964 41230 45353 47446 47740 51205 57722 64391 64790 66836 67780 74558 82460 83545 90706 94892 102410 105059 115444 118615 128782 129580 144305 149116 166061 167090 181412 186395 204820 210118 226765 237230 257564 260953 288610 317471 321955 332122 334180 372790 420236 450737 453530 474460 521906 525295 577220 634942 643910 664244 708301 735413 745580 830305 901474 907060 1043812 1050590 1155649 1269884 1287820 1304765 1416602 1470826 1587355 1660610 1802948 1826671 1996121 2101180 2253685 2311298 2609530 2833204 2941652 3155159 3174710 3321220 3541505 3653342 3677065 3992242 4507370 4622596 4958107 5147891 5219060 5778245 6310318 6349420 7083010 7306684 7354130 7984484 8089543 9014740 9133355 9916214 9980605 10295782 11556490 12620636 13972847 14166020 14708260 15775795 16179086 18266710 19832428 19961210 20591564 21957331 23112980 24790535 25739455 27945694 31551590 32358172 34706749 36533420 39922420 40447715 43914662 49581070 51478910 55891388 56626801 63103180 69413498 69864235 80895430 87829324 97809929 99162140 102957820 109786655 113253602 138826996 139728470 153701317 161790860 173533745 195619858 219573310 226507204 279456940 283134005 307402634 347067490 391239716 439146620 489049645 566268010 614805268 694134980 768506585 978099290 1075909219 1132536020 1537013170 1956198580 2151818438 3074026340 4303636876 5379546095 10759092190 21518184380
• Sum of all divisors σ(n): 62328268800
• Sum of proper divisors (its aliquot sum) s(n): 40810084420
• 21518184380 is an abundant number, because the sum of its proper divisors (40810084420) is greater than itself. Its abundance is 19291900040

Bases of 21518184380

• Binary: 10100000010100101010110111110111100₂
• Hexadecimal: 0x502956FBC
• Base-36: 9VVDDBW

Squares and roots of 21518184380

• 21518184380 squared (21518184380²) is 463032259011675984400
• 21518184380 cubed (21518184380³) is 9963613523301160405137203672000
• The square root of 21518184380 is 146690.7781014199
• The cube root of 21518184380 is 2781.4326061615

Scales and comparisons

• 21,518,184,380 seconds is equal to 684 years, 11 weeks, 1 hour, 26 minutes, 20 seconds.
• To count from 1 to 21,518,184,380 would take you about one thousand, three hundred sixty-eight 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 21518184380 cubic inches would be around 231.8 feet tall.

Recreational maths with 21518184380

• 21518184380 backwards is 08348181512
• The number of decimal digits it has is: 11
• The sum of 21518184380's digits is 41
• More coming soon!