21321138936

Names of 21321138936

• Cardinal: 21321138936 can be written as Twenty-one billion, three hundred twenty-one million, one hundred thirty-eight thousand, nine hundred thirty-six.

Scientific notation

• Scientific notation: 2.1321138936 × 10¹⁰

Factors of 21321138936

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 6632

Divisors of 21321138936

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 4 6 8 12 24 83 166 249 332 498 664 996 1992 3221 3323 6442 6646 9663 9969 12884 13292 19326 19938 25768 26584 38652 39876 77304 79752 267343 275809 534686 551618 802029 827427 1069372 1103236 1604058 1654854 2138744 2206472 3208116 3309708 6416232 6619416 10703383 21406766 32110149 42813532 64220298 85627064 128440596 256881192 888380789 1776761578 2665142367 3553523156 5330284734 7107046312 10660569468 21321138936
• Sum of all divisors σ(n): 53978037120
• Sum of proper divisors (its aliquot sum) s(n): 32656898184
• 21321138936 is an abundant number, because the sum of its proper divisors (32656898184) is greater than itself. Its abundance is 11335759248

Bases of 21321138936

• Binary: 10011110110110101101100001011111000₂
• Hexadecimal: 0x4F6D6C2F8
• Base-36: 9SM203C

Squares and roots of 21321138936

• 21321138936 squared (21321138936²) is 454590965528215212096
• 21321138936 cubed (21321138936³) is 9692397135077463165207523769856
• The square root of 21321138936 is 146017.5980353053
• The cube root of 21321138936 is 2772.9165515023

Scales and comparisons

• 21,321,138,936 seconds is equal to 677 years, 49 weeks, 1 day, 10 hours, 35 minutes, 36 seconds.
• To count from 1 to 21,321,138,936 would take you about one thousand, three hundred fifty-five 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 21321138936 cubic inches would be around 231.1 feet tall.

Recreational maths with 21321138936

• 21321138936 backwards is 63983112312
• The number of decimal digits it has is: 11
• The sum of 21321138936's digits is 39
• More coming soon!