21385530555987

Names of 21385530555987

• Cardinal: 21385530555987 can be written as Twenty-one trillion, three hundred eighty-five billion, five hundred thirty million, five hundred fifty-five thousand, nine hundred eighty-seven.

Scientific notation

• Scientific notation: 2.1385530555987 × 10¹³

Factors of 21385530555987

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 75

Divisors of 21385530555987

• Number of divisors d(n): 42
• Complete list of divisors:
  1 3 13 39 59 169 177 507 767 2301 3481 9971 10443 29913 45253 135759 205379 588289 616137 1764867 2669927 8009781 12117361 34709051 36352083 104127153 157525693 472577079 714924299 2047834009 2144772897 6143502027 9294015887 27882047661 42180533641 120822206531 126541600923 362466619593 548346937333 1645040811999 7128510185329 21385530555987
• Sum of all divisors σ(n): 31408498049772
• Sum of proper divisors (its aliquot sum) s(n): 10022967493785
• 21385530555987 is a deficient number, because the sum of its proper divisors (10022967493785) is less than itself. Its deficiency is 11362563062202

Bases of 21385530555987

• Binary: 100110111001100110100111100111011111001010011₂
• Hexadecimal: 0x137334F3BE53
• Base-36: 7KWDKQGK3

Squares and roots of 21385530555987

• 21385530555987 squared (21385530555987²) is 457340917161053645341544169
• 21385530555987 cubed (21385530555987³) is 9780478158450832073683686184983687889803
• The square root of 21385530555987 is 4624449.2164999499
• The cube root of 21385530555987 is 27757.0522588539
• Being both a perfect square and a perfect cube, 21385530555987 is also a perfect sixth number.

Scales and comparisons

• 21,385,530,555,987 seconds is equal to 679,993 years, 37 weeks, 3 days, 18 hours, 26 minutes, 27 seconds.
• To count from 1 to 21,385,530,555,987 would take you about one million, six hundred ninety-nine thousand, nine hundred eighty-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 21385530555987 cubic inches would be around 2313.1 feet tall.

Recreational maths with 21385530555987

• 21385530555987 backwards is 78955503558312
• The number of decimal digits it has is: 14
• The sum of 21385530555987's digits is 66
• More coming soon!