21721359720316927

Names of 21721359720316927

• Cardinal: 21721359720316927 can be written as Twenty-one quadrillion, seven hundred twenty-one trillion, three hundred fifty-nine billion, seven hundred twenty million, three hundred sixteen thousand, nine hundred twenty-seven.

Scientific notation

• Scientific notation: 2.1721359720316927 × 10¹⁶

Factors of 21721359720316927

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 31189974

Divisors of 21721359720316927

• Number of divisors d(n): 16
• Complete list of divisors:
  1 11 1663 18293 38119 419309 31150181 63391897 342651991 697310867 51802751003 569830261033 1187413749539 13061551244929 1974669065483357 21721359720316927
• Sum of all divisors σ(n): 23710900518789120
• Sum of proper divisors (its aliquot sum) s(n): 1989540798472193
• 21721359720316927 is a deficient number, because the sum of its proper divisors (1989540798472193) is less than itself. Its deficiency is 19731818921844734

Bases of 21721359720316927

• Binary: 1001101001010110111011000101010001010101111111111111111₂
• Hexadecimal: 0x4D2B762A2AFFFF
• Base-36: 5XVKUWCL6GV

Squares and roots of 21721359720316927

• 21721359720316927 squared (21721359720316927²) is 471817468099406649144061322723329
• 21721359720316927 cubed (21721359720316927³) is 10248516946916368239330326743705719167734616489983
• The square root of 21721359720316927 is 147381680.4094624475
• The cube root of 21721359720316927 is 279015.9320831615

Scales and comparisons

• 21,721,359,720,316,927 seconds is equal to 690,672,050 years, 27 weeks, 3 days, 13 hours, 22 minutes, 7 seconds.
• To count from 1 to 21,721,359,720,316,927 would take you about two billion, seventy-two million, sixteen thousand, one hundred fifty-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 21721359720316927 cubic inches would be around 23251.3 feet tall.

Recreational maths with 21721359720316927

• 21721359720316927 backwards is 72961302795312712
• The number of decimal digits it has is: 17
• The sum of 21721359720316927's digits is 67
• More coming soon!