21018304265

Names of 21018304265

• Cardinal: 21018304265 can be written as Twenty-one billion, eighteen million, three hundred four thousand, two hundred sixty-five.

Scientific notation

• Scientific notation: 2.1018304265 × 10¹⁰

Factors of 21018304265

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 6585

Divisors of 21018304265

• Number of divisors d(n): 64
• Complete list of divisors:
  1 5 7 31 35 49 61 155 217 245 305 343 427 1085 1519 1715 1891 2135 2989 6481 7595 9455 10633 13237 14945 20923 32405 45367 53165 66185 92659 104615 200911 226835 317569 395341 463295 648613 1004555 1406377 1587845 1976705 2222983 2767387 3243065 7031885 9844639 11114915 12255571 13836935 19371709 49223195 61277855 68912473 85788997 96858545 135601963 344562365 428944985 600522979 678009815 3002614895 4203660853 21018304265
• Sum of all divisors σ(n): 30864691200
• Sum of proper divisors (its aliquot sum) s(n): 9846386935
• 21018304265 is a deficient number, because the sum of its proper divisors (9846386935) is less than itself. Its deficiency is 11171917330

Bases of 21018304265

• Binary: 10011100100110010011101111100001001₂
• Hexadecimal: 0x4E4C9DF09
• Base-36: 9NLR7D5

Squares and roots of 21018304265

• 21018304265 squared (21018304265²) is 441769114176117190225
• 21018304265 cubed (21018304265³) is 9285237656633155900445933809625
• The square root of 21018304265 is 144976.9094200867
• The cube root of 21018304265 is 2759.7255321565

Scales and comparisons

• 21,018,304,265 seconds is equal to 668 years, 16 weeks, 3 days, 9 hours, 51 minutes, 5 seconds.
• To count from 1 to 21,018,304,265 would take you about one thousand, three hundred thirty-six 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 21018304265 cubic inches would be around 230 feet tall.

Recreational maths with 21018304265

• 21018304265 backwards is 56240381012
• The number of decimal digits it has is: 11
• The sum of 21018304265's digits is 32
• More coming soon!