21521068992

Names of 21521068992

• Cardinal: 21521068992 can be written as Twenty-one billion, five hundred twenty-one million, sixty-eight thousand, nine hundred ninety-two.

Scientific notation

• Scientific notation: 2.1521068992 × 10¹⁰

Factors of 21521068992

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1205293

Divisors of 21521068992

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 31 32 36 48 62 64 72 93 96 124 144 186 192 248 279 288 372 496 558 576 744 992 1116 1488 1984 2232 2976 4464 5952 8928 17856 1205257 2410514 3615771 4821028 7231542 9642056 10847313 14463084 19284112 21694626 28926168 37362967 38568224 43389252 57852336 74725934 77136448 86778504 112088901 115704672 149451868 173557008 224177802 231409344 298903736 336266703 347114016 448355604 597807472 672533406 694228032 896711208 1195614944 1345066812 1793422416 2391229888 2690133624 3586844832 5380267248 7173689664 10760534496 21521068992
• Sum of all divisors σ(n): 63676190656
• Sum of proper divisors (its aliquot sum) s(n): 42155121664
• 21521068992 is an abundant number, because the sum of its proper divisors (42155121664) is greater than itself. Its abundance is 20634052672

Bases of 21521068992

• Binary: 10100000010110000010111001111000000₂
• Hexadecimal: 0x502C173C0
• Base-36: 9VX3740

Squares and roots of 21521068992

• 21521068992 squared (21521068992²) is 463156410558423896064
• 21521068992 cubed (21521068992³) is 9967621065714917913974781247488
• The square root of 21521068992 is 146700.6100600813
• The cube root of 21521068992 is 2781.5568885705

Scales and comparisons

• 21,521,068,992 seconds is equal to 684 years, 15 weeks, 5 days, 10 hours, 43 minutes, 12 seconds.
• To count from 1 to 21,521,068,992 would take you about one thousand, three hundred sixty-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 21521068992 cubic inches would be around 231.8 feet tall.

Recreational maths with 21521068992

• 21521068992 backwards is 29986012512
• The number of decimal digits it has is: 11
• The sum of 21521068992's digits is 45
• More coming soon!