21237216216

Names of 21237216216

• Cardinal: 21237216216 can be written as Twenty-one billion, two hundred thirty-seven million, two hundred sixteen thousand, two hundred sixteen.

Scientific notation

• Scientific notation: 2.1237216216 × 10¹⁰

Factors of 21237216216

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 353

Divisors of 21237216216

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 8 12 24 151 197 302 394 453 591 604 788 906 1182 1208 1576 1812 2364 3624 4728 22801 29747 38809 45602 59494 68403 77618 89241 91204 116427 118988 136806 155236 178482 182408 232854 237976 273612 310472 356964 465708 547224 713928 931416 4491797 5860159 8983594 11720318 13475391 17580477 17967188 23440636 26950782 35160954 35934376 46881272 53901564 70321908 107803128 140643816 884884009 1769768018 2654652027 3539536036 5309304054 7079072072 10618608108 21237216216
• Sum of all divisors σ(n): 53719660260
• Sum of proper divisors (its aliquot sum) s(n): 32482444044
• 21237216216 is an abundant number, because the sum of its proper divisors (32482444044) is greater than itself. Its abundance is 11245227828

Bases of 21237216216

• Binary: 10011110001110101100011001111011000₂
• Hexadecimal: 0x4F1D633D8
• Base-36: 9R838WO

Squares and roots of 21237216216

• 21237216216 squared (21237216216²) is 451019352605133358656
• 21237216216 cubed (21237216216³) is 9578395508875560009291747165696
• The square root of 21237216216 is 145729.9427571423
• The cube root of 21237216216 is 2769.2735832759

Scales and comparisons

• 21,237,216,216 seconds is equal to 675 years, 14 weeks, 3 days, 2 hours, 43 minutes, 36 seconds.
• To count from 1 to 21,237,216,216 would take you about one thousand, three hundred fifty 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 21237216216 cubic inches would be around 230.8 feet tall.

Recreational maths with 21237216216

• 21237216216 backwards is 61261273212
• The number of decimal digits it has is: 11
• The sum of 21237216216's digits is 33
• More coming soon!