21721429226924991

Names of 21721429226924991

• Cardinal: 21721429226924991 can be written as Twenty-one quadrillion, seven hundred twenty-one trillion, four hundred twenty-nine billion, two hundred twenty-six million, nine hundred twenty-four thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 2.1721429226924991 × 10¹⁶

Factors of 21721429226924991

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 10415700

Divisors of 21721429226924991

• Number of divisors d(n): 24
• Complete list of divisors:
  1 3 9 89 267 801 5150069 5265539 15450207 15796617 46350621 47389851 458356141 468632971 1375068423 1405898913 4125205269 4217696739 27117889172191 81353667516573 244061002549719 2413492136324999 7240476408974997 21721429226924991
• Sum of all divisors σ(n): 31727942517726000
• Sum of proper divisors (its aliquot sum) s(n): 10006513290801009
• 21721429226924991 is a deficient number, because the sum of its proper divisors (10006513290801009) is less than itself. Its deficiency is 11714915936123982

Bases of 21721429226924991

• Binary: 1001101001010111000011001011001000101011010101110111111₂
• Hexadecimal: 0x4D2B865915ABBF
• Base-36: 5XVLQTV10HR

Squares and roots of 21721429226924991

• 21721429226924991 squared (21721429226924991²) is 471820487660311212159229540350081
• 21721429226924991 cubed (21721429226924991³) is 10248615330526686028752374031849173596625267774271
• The square root of 21721429226924991 is 147381916.2140491067
• The cube root of 21721429226924991 is 279016.2296923749

Scales and comparisons

• 21,721,429,226,924,991 seconds is equal to 690,674,260 years, 32 weeks, 3 days, 4 hours, 29 minutes, 51 seconds.
• To count from 1 to 21,721,429,226,924,991 would take you about two billion, seventy-two million, twenty-two thousand, seven hundred eighty-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 21721429226924991 cubic inches would be around 23251.4 feet tall.

Recreational maths with 21721429226924991

• 21721429226924991 backwards is 19942962292412712
• The number of decimal digits it has is: 17
• The sum of 21721429226924991's digits is 72
• More coming soon!