21207401865

Names of 21207401865

• Cardinal: 21207401865 can be written as Twenty-one billion, two hundred seven million, four hundred one thousand, eight hundred sixty-five.

Scientific notation

• Scientific notation: 2.1207401865 × 10¹⁰

Factors of 21207401865

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3375

Divisors of 21207401865

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 5 9 13 15 39 45 65 117 169 195 507 585 845 1521 1523 1831 2535 4569 5493 7605 7615 9155 13707 16479 19799 22845 23803 27465 59397 68535 71409 82395 98995 119015 178191 214227 257387 296985 309439 357045 772161 890955 928317 1071135 1286935 1547195 2316483 2784951 2788613 3860805 4641585 8365839 11582415 13924755 13943065 25097517 36251969 41829195 108755907 125487585 181259845 326267721 471275597 543779535 1413826791 1631338605 2356377985 4241480373 7069133955 21207401865
• Sum of all divisors σ(n): 39852551232
• Sum of proper divisors (its aliquot sum) s(n): 18645149367
• 21207401865 is a deficient number, because the sum of its proper divisors (18645149367) is less than itself. Its deficiency is 2562252498

Bases of 21207401865

• Binary: 10011110000000011110100010110001001₂
• Hexadecimal: 0x4F00F4589
• Base-36: 9QQC809

Squares and roots of 21207401865

• 21207401865 squared (21207401865²) is 449753893863605478225
• 21207401865 cubed (21207401865³) is 9538111567514038874533081889625
• The square root of 21207401865 is 145627.6136761155
• The cube root of 21207401865 is 2767.9770737201

Scales and comparisons

• 21,207,401,865 seconds is equal to 674 years, 17 weeks, 1 day, 57 minutes, 45 seconds.
• To count from 1 to 21,207,401,865 would take you about one thousand, three hundred forty-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 21207401865 cubic inches would be around 230.7 feet tall.

Recreational maths with 21207401865

• 21207401865 backwards is 56810470212
• The number of decimal digits it has is: 11
• The sum of 21207401865's digits is 36
• More coming soon!