21131604

Names of 21131604

• Cardinal: 21131604 can be written as Twenty-one million, one hundred thirty-one thousand, six hundred four.

Scientific notation

• Scientific notation: 2.1131604 × 10⁷

Factors of 21131604

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 220

Divisors of 21131604

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 9 12 13 18 26 27 29 36 39 52 54 58 78 81 87 108 116 117 156 162 173 174 234 261 324 346 348 351 377 468 519 522 692 702 754 783 1038 1044 1053 1131 1404 1508 1557 1566 2076 2106 2249 2262 2349 3114 3132 3393 4212 4498 4524 4671 4698 5017 6228 6747 6786 8996 9342 9396 10034 10179 13494 13572 14013 15051 18684 20068 20241 20358 26988 28026 30102 30537 40482 40716 45153 56052 60204 60723 61074 65221 80964 90306 121446 122148 130442 135459 180612 182169 195663 242892 260884 270918 364338 391326 406377 541836 586989 728676 782652 812754 1173978 1625508 1760967 2347956 3521934 5282901 7043868 10565802 21131604
• Sum of all divisors σ(n): 61898760
• Sum of proper divisors (its aliquot sum) s(n): 40767156
• 21131604 is an abundant number, because the sum of its proper divisors (40767156) is greater than itself. Its abundance is 19635552

Bases of 21131604

• Binary: 1010000100111000101010100₂
• Hexadecimal: 0x1427154
• Base-36: CKX90

Squares and roots of 21131604

• 21131604 squared (21131604²) is 446544687612816
• 21131604 cubed (21131604³) is 9436205506937733036864
• The square root of 21131604 is 4596.9124420637
• The cube root of 21131604 is 276.4675440171

Scales and comparisons

• 21,131,604 seconds is equal to 34 weeks, 6 days, 13 hours, 53 minutes, 24 seconds.
• To count from 1 to 21,131,604 would take you about two days!

  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 21131604 cubic inches would be around 23 feet tall.

Recreational maths with 21131604

• 21131604 backwards is 40613112
• 21131604 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21131604's digits is 18
• More coming soon!