21015825870621712

Names of 21015825870621712

• Cardinal: 21015825870621712 can be written as Twenty-one quadrillion, fifteen trillion, eight hundred twenty-five billion, eight hundred seventy million, six hundred twenty-one thousand, seven hundred twelve.

Scientific notation

• Scientific notation: 2.1015825870621712 × 10¹⁶

Factors of 21015825870621712

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 45378949

Divisors of 21015825870621712

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 4 8 13 16 26 52 104 169 208 338 676 1352 2704 171923 343846 687692 1375384 2234999 2750768 4469998 8939996 17879992 29054987 35759984 45207011 58109974 90414022 116219948 180828044 232439896 361656088 464879792 587691143 723312176 1175382286 2350764572 4701529144 7639984859 9403058288 15279969718 30559939436 61119878872 122239757744 7772124952153 15544249904306 31088499808612 62176999617224 101037624377989 124353999234448 202075248755978 404150497511956 808300995023912 1313489116913857 1616601990047824 2626978233827714 5253956467655428 10507912935310856 21015825870621712
• Sum of all divisors σ(n): 44091522288262224
• Sum of proper divisors (its aliquot sum) s(n): 23075696417640512
• 21015825870621712 is an abundant number, because the sum of its proper divisors (23075696417640512) is greater than itself. Its abundance is 2059870547018800

Bases of 21015825870621712

• Binary: 1001010101010011100100001000011101011100000110000010000₂
• Hexadecimal: 0x4AA9C843AE0C10
• Base-36: 5QXHL4ETNV4

Squares and roots of 21015825870621712

• 21015825870621712 squared (21015825870621712²) is 441664937024292839166965405810944
• 21015825870621712 cubed (21015825870621712³) is 9281953409661642659148107974460857640698813616128
• The square root of 21015825870621712 is 144968361.6194296099
• The cube root of 21015825870621712 is 275961.7055960225

Scales and comparisons

• 21,015,825,870,621,712 seconds is equal to 668,238,256 years, 24 weeks, 2 days, 10 hours, 1 minute, 52 seconds.
• To count from 1 to 21,015,825,870,621,712 would take you about two billion, four million, seven hundred fourteen thousand, seven hundred sixty-nine 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 21015825870621712 cubic inches would be around 22996.8 feet tall.

Recreational maths with 21015825870621712

• 21015825870621712 backwards is 21712607852851012
• The number of decimal digits it has is: 17
• The sum of 21015825870621712's digits is 58
• More coming soon!