21729398406

Names of 21729398406

• Cardinal: 21729398406 can be written as Twenty-one billion, seven hundred twenty-nine million, three hundred ninety-eight thousand, four hundred six.

Scientific notation

• Scientific notation: 2.1729398406 × 10¹⁰

Factors of 21729398406

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 1604696

Divisors of 21729398406

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 3 6 37 61 74 111 122 183 222 366 2257 4514 6771 13542 1604593 3209186 4813779 9627558 59369941 97880173 118739882 178109823 195760346 293640519 356219646 587281038 3621566401 7243132802 10864699203 21729398406
• Sum of all divisors σ(n): 45365081568
• Sum of proper divisors (its aliquot sum) s(n): 23635683162
• 21729398406 is an abundant number, because the sum of its proper divisors (23635683162) is greater than itself. Its abundance is 1906284756

Bases of 21729398406

• Binary: 10100001111001011000100111010000110₂
• Hexadecimal: 0x50F2C4E86
• Base-36: 9ZD4F46

Squares and roots of 21729398406

• 21729398406 squared (21729398406²) is 472166755086675340836
• 21729398406 cubed (21729398406³) is 10259899535346595543001285107416
• The square root of 21729398406 is 147408.9495451345
• The cube root of 21729398406 is 2790.5034743555

Scales and comparisons

• 21,729,398,406 seconds is equal to 690 years, 48 weeks, 1 day, 16 hours, 6 seconds.
• To count from 1 to 21,729,398,406 would take you about one thousand, three 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 21729398406 cubic inches would be around 232.5 feet tall.

Recreational maths with 21729398406

• 21729398406 backwards is 60489392712
• The number of decimal digits it has is: 11
• The sum of 21729398406's digits is 51
• More coming soon!