21305881440

Names of 21305881440

• Cardinal: 21305881440 can be written as Twenty-one billion, three hundred five million, eight hundred eighty-one thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.130588144 × 10¹⁰

Factors of 21305881440

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 4931927

Divisors of 21305881440

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 72 80 90 96 108 120 135 144 160 180 216 240 270 288 360 432 480 540 720 864 1080 1440 2160 4320 4931917 9863834 14795751 19727668 24659585 29591502 39455336 44387253 49319170 59183004 73978755 78910672 88774506 98638340 118366008 133161759 147957510 157821344 177549012 197276680 221936265 236732016 266323518 295915020 355098024 394553360 443872530 473464032 532647036 591830040 665808795 710196048 789106720 887745060 1065294072 1183660080 1331617590 1420392096 1775490120 2130588144 2367320160 2663235180 3550980240 4261176288 5326470360 7101960480 10652940720 21305881440
• Sum of all divisors σ(n): 74570600160
• Sum of proper divisors (its aliquot sum) s(n): 53264718720
• 21305881440 is an abundant number, because the sum of its proper divisors (53264718720) is greater than itself. Its abundance is 31958837280

Bases of 21305881440

• Binary: 10011110101111011011111001101100000₂
• Hexadecimal: 0x4F5EDF360
• Base-36: 9SCYZC0

Squares and roots of 21305881440

• 21305881440 squared (21305881440²) is 453940583935336473600
• 21305881440 cubed (21305881440³) is 9671604262130647533029289984000
• The square root of 21305881440 is 145965.3432839453
• The cube root of 21305881440 is 2772.2549567785

Scales and comparisons

• 21,305,881,440 seconds is equal to 677 years, 23 weeks, 6 days, 20 hours, 24 minutes.
• To count from 1 to 21,305,881,440 would take you about one thousand, three hundred fifty-four 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 21305881440 cubic inches would be around 231 feet tall.

Recreational maths with 21305881440

• 21305881440 backwards is 04418850312
• 21305881440 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21305881440's digits is 36
• More coming soon!