21721572802491543

Names of 21721572802491543

• Cardinal: 21721572802491543 can be written as Twenty-one quadrillion, seven hundred twenty-one trillion, five hundred seventy-two billion, eight hundred two million, four hundred ninety-one thousand, five hundred forty-three.

Scientific notation

• Scientific notation: 2.1721572802491543 × 10¹⁶

Factors of 21721572802491543

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 386412891

Divisors of 21721572802491543

• Number of divisors d(n): 12
• Complete list of divisors:
  1 3 9 6350291 19050873 57152619 380062597 1140187791 3420563373 2413508089165727 7240524267497181 21721572802491543
• Sum of all divisors σ(n): 31375610182522008
• Sum of proper divisors (its aliquot sum) s(n): 9654037380030465
• 21721572802491543 is a deficient number, because the sum of its proper divisors (9654037380030465) is less than itself. Its deficiency is 12067535422461078

Bases of 21721572802491543

• Binary: 1001101001010111010011111000110110110101111010010010111₂
• Hexadecimal: 0x4D2BA7C6DAF497
• Base-36: 5XVNKSC7ONR

Squares and roots of 21721572802491543

• 21721572802491543 squared (21721572802491543²) is 471826725013940305323868586520849
• 21721572802491543 cubed (21721572802491543³) is 10248818557551461930868046949893267780973115680007
• The square root of 21721572802491543 is 147382403.3000260957
• The cube root of 21721572802491543 is 279016.8444435897

Scales and comparisons

• 21,721,572,802,491,543 seconds is equal to 690,678,825 years, 45 weeks, 6 days, 10 hours, 19 minutes, 3 seconds.
• To count from 1 to 21,721,572,802,491,543 would take you about two billion, seventy-two million, thirty-six thousand, four hundred seventy-seven 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 21721572802491543 cubic inches would be around 23251.4 feet tall.

Recreational maths with 21721572802491543

• 21721572802491543 backwards is 34519420827512712
• The number of decimal digits it has is: 17
• The sum of 21721572802491543's digits is 63
• More coming soon!