21351690477

Names of 21351690477

• Cardinal: 21351690477 can be written as Twenty-one billion, three hundred fifty-one million, six hundred ninety thousand, four hundred seventy-seven.

Scientific notation

• Scientific notation: 2.1351690477 × 10¹⁰

Factors of 21351690477

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 114

Divisors of 21351690477

• Number of divisors d(n): 126
• Complete list of divisors:
  1 3 9 13 19 27 39 57 79 81 117 171 237 243 247 351 361 513 711 729 741 1027 1053 1083 1501 1539 2133 2223 3081 3159 3249 4503 4617 4693 6241 6399 6669 9243 9477 9747 13509 13851 14079 18723 19197 19513 20007 27729 28519 29241 40527 42237 56169 57591 58539 60021 81133 83187 85557 87723 118579 121581 126711 168507 175617 180063 243399 249561 256671 263169 355737 364743 370747 380133 505521 526851 730197 748683 770013 1067211 1094229 1112241 1140399 1516563 1541527 1580553 2190591 2253001 2310039 3201633 3336723 3421197 4549689 4624581 4741659 6571773 6759003 6930117 9604899 10010169 13873743 14224977 19715319 20277009 20790351 28814697 29289013 30030507 41621229 59145957 60831027 86444091 87867039 90091521 124863687 182493081 263601117 270274563 374591061 547479243 790803351 1123773183 1642437729 2372410053 7117230159 21351690477
• Sum of all divisors σ(n): 36851821902
• Sum of proper divisors (its aliquot sum) s(n): 15500131425
• 21351690477 is a deficient number, because the sum of its proper divisors (15500131425) is less than itself. Its deficiency is 5851559052

Bases of 21351690477

• Binary: 10011111000101010001111000011101101₂
• Hexadecimal: 0x4F8A8F0ED
• Base-36: 9T48TT9

Squares and roots of 21351690477

• 21351690477 squared (21351690477²) is 455894686225612487529
• 21351690477 cubed (21351690477³) is 9734122230398313223465230561333
• The square root of 21351690477 is 146122.1765407291
• The cube root of 21351690477 is 2774.2403776185

Scales and comparisons

• 21,351,690,477 seconds is equal to 678 years, 47 weeks, 5 days, 1 hour, 7 minutes, 57 seconds.
• To count from 1 to 21,351,690,477 would take you about one thousand, three hundred fifty-seven 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 21351690477 cubic inches would be around 231.2 feet tall.

Recreational maths with 21351690477

• 21351690477 backwards is 77409615312
• The number of decimal digits it has is: 11
• The sum of 21351690477's digits is 45
• More coming soon!