21333987864

Names of 21333987864

• Cardinal: 21333987864 can be written as Twenty-one billion, three hundred thirty-three million, nine hundred eighty-seven thousand, eight hundred sixty-four.

Scientific notation

• Scientific notation: 2.1333987864 × 10¹⁰

Factors of 21333987864

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 42329353

Divisors of 21333987864

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 18 21 24 28 36 42 56 63 72 84 126 168 252 504 42329341 84658682 126988023 169317364 253976046 296305387 338634728 380964069 507952092 592610774 761928138 888916161 1015904184 1185221548 1523856276 1777832322 2370443096 2666748483 3047712552 3555664644 5333496966 7111329288 10666993932 21333987864
• Sum of all divisors σ(n): 66033773520
• Sum of proper divisors (its aliquot sum) s(n): 44699785656
• 21333987864 is an abundant number, because the sum of its proper divisors (44699785656) is greater than itself. Its abundance is 23365797792

Bases of 21333987864

• Binary: 10011110111100110101101001000011000₂
• Hexadecimal: 0x4F79AD218
• Base-36: 9STPEE0

Squares and roots of 21333987864

• 21333987864 squared (21333987864²) is 455139038181299282496
• 21333987864 cubed (21333987864³) is 9709930716992471524521571628544
• The square root of 21333987864 is 146061.5892834251
• The cube root of 21333987864 is 2773.4734612511

Scales and comparisons

• 21,333,987,864 seconds is equal to 678 years, 18 weeks, 3 days, 3 hours, 44 minutes, 24 seconds.
• To count from 1 to 21,333,987,864 would take you about one thousand, three hundred fifty-six 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 21333987864 cubic inches would be around 231.1 feet tall.

Recreational maths with 21333987864

• 21333987864 backwards is 46878933312
• The number of decimal digits it has is: 11
• The sum of 21333987864's digits is 54
• More coming soon!