21317979640

Names of 21317979640

• Cardinal: 21317979640 can be written as Twenty-one billion, three hundred seventeen million, nine hundred seventy-nine thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.131797964 × 10¹⁰

Factors of 21317979640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 166872

Divisors of 21317979640

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 5 8 10 20 23 40 46 92 115 139 184 230 278 460 556 695 920 1112 1390 2780 3197 5560 6394 12788 15985 25576 31970 63940 127880 166703 333406 666812 833515 1333624 1667030 3334060 3834169 6668120 7668338 15336676 19170845 23171717 30673352 38341690 46343434 76683380 92686868 115858585 153366760 185373736 231717170 463434340 532949491 926868680 1065898982 2131797964 2664747455 4263595928 5329494910 10658989820 21317979640
• Sum of all divisors σ(n): 50411289600
• Sum of proper divisors (its aliquot sum) s(n): 29093309960
• 21317979640 is an abundant number, because the sum of its proper divisors (29093309960) is greater than itself. Its abundance is 7775330320

Bases of 21317979640

• Binary: 10011110110101001101000110111111000₂
• Hexadecimal: 0x4F6A68DF8
• Base-36: 9SK6AD4

Squares and roots of 21317979640

• 21317979640 squared (21317979640²) is 454456255931454529600
• 21317979640 cubed (21317979640³) is 9688089211217376897598577344000
• The square root of 21317979640 is 146006.7794316417
• The cube root of 21317979640 is 2772.7795841959

Scales and comparisons

• 21,317,979,640 seconds is equal to 677 years, 43 weeks, 6 days, 21 hours, 40 seconds.
• To count from 1 to 21,317,979,640 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 21317979640 cubic inches would be around 231.1 feet tall.

Recreational maths with 21317979640

• 21317979640 backwards is 04697971312
• The number of decimal digits it has is: 11
• The sum of 21317979640's digits is 49
• More coming soon!