21523278470216721

Names of 21523278470216721

• Cardinal: 21523278470216721 can be written as Twenty-one quadrillion, five hundred twenty-three trillion, two hundred seventy-eight billion, four hundred seventy million, two hundred sixteen thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 2.1523278470216721 × 10¹⁶

Factors of 21523278470216721

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1878207

Divisors of 21523278470216721

• Number of divisors d(n): 48
• Complete list of divisors:
  1 3 11 33 71 121 213 363 781 2343 8591 25773 722899 1155223 2168697 3465669 7951889 12707453 23855667 38122359 51325829 82020833 87470779 139781983 153977487 246062499 262412337 419345949 564584119 902229163 1693752357 2706687489 6210425309 9924520793 18631275927 29773562379 835109551477 2505328654431 9186205066247 27558615198741 59292778154867 101048255728717 177878334464601 303144767186151 652220559703537 1956661679110611 7174426156738907 21523278470216721
• Sum of all divisors σ(n): 31988108199398400
• Sum of proper divisors (its aliquot sum) s(n): 10464829729181679
• 21523278470216721 is a deficient number, because the sum of its proper divisors (10464829729181679) is less than itself. Its deficiency is 11058448741035042

Bases of 21523278470216721

• Binary: 1001100011101110100111011000111100111100111110000010001₂
• Hexadecimal: 0x4C774EC79E7C11
• Base-36: 5VXD5MML24X

Squares and roots of 21523278470216721

• 21523278470216721 squared (21523278470216721²) is 463251516106494633766640707991841
• 21523278470216721 cubed (21523278470216721³) is 9970691382910170509942188578070888471839969773361
• The square root of 21523278470216721 is 146708140.4360941417
• The cube root of 21523278470216721 is 278165.2075586899

Scales and comparisons

• 21,523,278,470,216,721 seconds is equal to 684,373,679 years, 25 weeks, 5 hours, 5 minutes, 21 seconds.
• To count from 1 to 21,523,278,470,216,721 would take you about two billion, fifty-three million, one hundred twenty-one thousand and thirty-eight 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 21523278470216721 cubic inches would be around 23180.4 feet tall.

Recreational maths with 21523278470216721

• 21523278470216721 backwards is 12761207487232512
• The number of decimal digits it has is: 17
• The sum of 21523278470216721's digits is 60
• More coming soon!