21408657543

Names of 21408657543

• Cardinal: 21408657543 can be written as Twenty-one billion, four hundred eight million, six hundred fifty-seven thousand, five hundred forty-three.

Scientific notation

• Scientific notation: 2.1408657543 × 10¹⁰

Factors of 21408657543

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2949

Divisors of 21408657543

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 7 9 13 21 39 63 91 117 169 273 507 819 1103 1183 1521 1823 3309 3549 5469 7721 9927 10647 12761 14339 16407 23163 23699 38283 43017 69489 71097 100373 114849 129051 165893 186407 213291 301119 308087 497679 559221 903357 924261 1304849 1493037 1677663 2010769 2156609 2772783 3914547 6032307 6469827 11743641 14075383 18096921 19409481 26139997 42226149 78419991 126678447 182979979 235259973 339819961 548939937 1019459883 1646819811 2378739727 3058379649 7136219181 21408657543
• Sum of all divisors σ(n): 38324662272
• Sum of proper divisors (its aliquot sum) s(n): 16916004729
• 21408657543 is a deficient number, because the sum of its proper divisors (16916004729) is less than itself. Its deficiency is 4492652814

Bases of 21408657543

• Binary: 10011111100000011100011000010000111₂
• Hexadecimal: 0x4FC0E3087
• Base-36: 9U25TVR

Squares and roots of 21408657543

• 21408657543 squared (21408657543²) is 458330617793450796849
• 21408657543 cubed (21408657543³) is 9812243237811610417960704482007
• The square root of 21408657543 is 146316.9762638635
• The cube root of 21408657543 is 2776.7054437987

Scales and comparisons

• 21,408,657,543 seconds is equal to 680 years, 37 weeks, 6 days, 9 hours, 19 minutes, 3 seconds.
• To count from 1 to 21,408,657,543 would take you about one thousand, three hundred sixty-one 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 21408657543 cubic inches would be around 231.4 feet tall.

Recreational maths with 21408657543

• 21408657543 backwards is 34575680412
• The number of decimal digits it has is: 11
• The sum of 21408657543's digits is 45
• More coming soon!