21556831472

Names of 21556831472

• Cardinal: 21556831472 can be written as Twenty-one billion, five hundred fifty-six million, eight hundred thirty-one thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 2.1556831472 × 10¹⁰

Factors of 21556831472

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 902

Divisors of 21556831472

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 8 11 16 22 44 88 97 121 176 191 194 242 382 388 484 601 764 776 968 1067 1202 1528 1552 1936 2101 2134 2404 3056 4202 4268 4808 6611 8404 8536 9616 11737 13222 16808 17072 18527 23111 23474 26444 33616 37054 46222 46948 52888 58297 72721 74108 92444 93896 105776 114791 116594 145442 148216 184888 187792 203797 229582 233188 290884 296432 369776 407594 459164 466376 581768 641267 815188 918328 932752 1163536 1262701 1282534 1630376 1836656 2241767 2525402 2565068 3260752 4483534 5050804 5130136 7053937 8967068 10101608 10260272 11134727 13889711 14107874 17934136 20203216 22269454 27779422 28215748 35868272 44538908 55558844 56431496 89077816 111117688 112862992 122481997 178155632 222235376 244963994 489927988 979855976 1347301967 1959711952 2694603934 5389207868 10778415736 21556831472
• Sum of all divisors σ(n): 46702177536
• Sum of proper divisors (its aliquot sum) s(n): 25145346064
• 21556831472 is an abundant number, because the sum of its proper divisors (25145346064) is greater than itself. Its abundance is 3588514592

Bases of 21556831472

• Binary: 10100000100111000110010010011110000₂
• Hexadecimal: 0x504E324F0
• Base-36: 9WIDPM8

Squares and roots of 21556831472

• 21556831472 squared (21556831472²) is 464696983112209686784
• 21556831472 cubed (21556831472³) is 10017394550496734283528593666048
• The square root of 21556831472 is 146822.4488012647
• The cube root of 21556831472 is 2783.0967798993

Scales and comparisons

• 21,556,831,472 seconds is equal to 685 years, 22 weeks, 6 days, 8 hours, 44 minutes, 32 seconds.
• To count from 1 to 21,556,831,472 would take you about one thousand, three hundred seventy 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 21556831472 cubic inches would be around 231.9 feet tall.

Recreational maths with 21556831472

• 21556831472 backwards is 27413865512
• 21556831472 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21556831472's digits is 44
• More coming soon!