21405342231

Names of 21405342231

• Cardinal: 21405342231 can be written as Twenty-one billion, four hundred five million, three hundred forty-two thousand, two hundred thirty-one.

Scientific notation

• Scientific notation: 2.1405342231 × 10¹⁰

Factors of 21405342231

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 33697

Divisors of 21405342231

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 13 21 27 37 39 49 63 91 111 117 147 189 259 273 333 351 441 481 637 777 819 999 1323 1443 1813 1911 2331 2457 3367 4329 5439 5733 6993 10101 12987 16317 17199 23569 30303 33637 48951 70707 90909 100911 212121 235459 302733 437281 636363 706377 908199 1244569 1311843 1648213 2119131 3060967 3733707 3935529 4944639 6357393 8711983 9182901 11201121 11806587 14833917 16179397 21426769 26135949 27548703 33603363 44501751 48538191 60983881 64280307 78407847 82646109 113255779 145614573 182951643 192840921 235223541 339767337 436843719 548854929 578522763 792790453 1019302011 1646564787 2378371359 3057906033 7135114077 21405342231
• Sum of all divisors σ(n): 40801548480
• Sum of proper divisors (its aliquot sum) s(n): 19396206249
• 21405342231 is a deficient number, because the sum of its proper divisors (19396206249) is less than itself. Its deficiency is 2009135982

Bases of 21405342231

• Binary: 10011111011110110111001101000010111₂
• Hexadecimal: 0x4FBDB9A17
• Base-36: 9U06RRR

Squares and roots of 21405342231

• 21405342231 squared (21405342231²) is 458188676026232057361
• 21405342231 cubed (21405342231³) is 9807685416710282321235427712391
• The square root of 21405342231 is 146305.6466135193
• The cube root of 21405342231 is 2776.5621042783

Scales and comparisons

• 21,405,342,231 seconds is equal to 680 years, 32 weeks, 3 days, 23 minutes, 51 seconds.
• To count from 1 to 21,405,342,231 would take you about one thousand, three hundred sixty-one 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 21405342231 cubic inches would be around 231.4 feet tall.

Recreational maths with 21405342231

• 21405342231 backwards is 13224350412
• 21405342231 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21405342231's digits is 27
• More coming soon!