21321471555

Names of 21321471555

• Cardinal: 21321471555 can be written as Twenty-one billion, three hundred twenty-one million, four hundred seventy-one thousand, five hundred fifty-five.

Scientific notation

• Scientific notation: 2.1321471555 × 10¹⁰

Factors of 21321471555

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 118

Divisors of 21321471555

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 5 9 15 31 45 79 93 155 237 279 395 465 711 961 1185 1395 2449 2883 3555 4805 6241 7347 8649 12245 14415 18723 22041 31205 36735 43245 56169 75919 93615 110205 193471 227757 280845 379595 493039 580413 683271 967355 1138785 1479117 1741239 2465195 2902065 3416355 4437351 5997601 7395585 8706195 15284209 17992803 22186755 29988005 45852627 53978409 76421045 89964015 137557881 229263135 269892045 473810479 687789405 1421431437 2369052395 4264294311 7107157185 21321471555
• Sum of all divisors σ(n): 38677429440
• Sum of proper divisors (its aliquot sum) s(n): 17355957885
• 21321471555 is a deficient number, because the sum of its proper divisors (17355957885) is less than itself. Its deficiency is 3965513670

Bases of 21321471555

• Binary: 10011110110110110111101011001000011₂
• Hexadecimal: 0x4F6DBD643
• Base-36: 9SM94QR

Squares and roots of 21321471555

• 21321471555 squared (21321471555²) is 454605149270674118025
• 21321471555 cubed (21321471555³) is 9692850758931207203144750278875
• The square root of 21321471555 is 146018.7369997427
• The cube root of 21321471555 is 2772.9309709935

Scales and comparisons

• 21,321,471,555 seconds is equal to 677 years, 49 weeks, 5 days, 6 hours, 59 minutes, 15 seconds.
• To count from 1 to 21,321,471,555 would take you about one thousand, three hundred fifty-five 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 21321471555 cubic inches would be around 231.1 feet tall.

Recreational maths with 21321471555

• 21321471555 backwards is 55517412312
• The number of decimal digits it has is: 11
• The sum of 21321471555's digits is 36
• More coming soon!