21321790405

Names of 21321790405

• Cardinal: 21321790405 can be written as Twenty-one billion, three hundred twenty-one million, seven hundred ninety thousand, four hundred five.

Scientific notation

• Scientific notation: 2.1321790405 × 10¹⁰

Factors of 21321790405

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1438

Divisors of 21321790405

• Number of divisors d(n): 64
• Complete list of divisors:
  1 5 17 19 47 85 95 235 257 323 799 893 1093 1285 1615 3995 4369 4465 4883 5465 12079 15181 18581 20767 21845 24415 51371 60395 75905 83011 92905 103835 205343 229501 256855 280901 353039 415055 873307 976049 1026715 1147505 1404505 1765195 3901517 4366535 4775317 4880245 5337119 13202347 16592833 19507585 23876585 26685595 66011735 82964165 90731023 224439899 250844593 453655115 1122199495 1254222965 4264358081 21321790405
• Sum of all divisors σ(n): 29263887360
• Sum of proper divisors (its aliquot sum) s(n): 7942096955
• 21321790405 is a deficient number, because the sum of its proper divisors (7942096955) is less than itself. Its deficiency is 13379693450

Bases of 21321790405

• Binary: 10011110110111000001011001111000101₂
• Hexadecimal: 0x4F6E0B3C5
• Base-36: 9SMFYRP

Squares and roots of 21321790405

• 21321790405 squared (21321790405²) is 454618746074750064025
• 21321790405 cubed (21321790405³) is 9693285617989737327901380680125
• The square root of 21321790405 is 146019.8288075973
• The cube root of 21321790405 is 2772.9447934391

Scales and comparisons

• 21,321,790,405 seconds is equal to 677 years, 50 weeks, 1 day, 23 hours, 33 minutes, 25 seconds.
• To count from 1 to 21,321,790,405 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 21321790405 cubic inches would be around 231.1 feet tall.

Recreational maths with 21321790405

• 21321790405 backwards is 50409712312
• The number of decimal digits it has is: 11
• The sum of 21321790405's digits is 34
• More coming soon!