20991432

Names of 20991432

• Cardinal: 20991432 can be written as Twenty million, nine hundred ninety-one thousand, four hundred thirty-two.

Scientific notation

• Scientific notation: 2.0991432 × 10⁷

Factors of 20991432

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 367

Divisors of 20991432

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 6 7 8 11 12 14 21 22 24 28 33 37 42 44 56 66 74 77 84 88 111 132 148 154 168 222 231 259 264 296 307 308 407 444 462 518 614 616 777 814 888 921 924 1036 1221 1228 1554 1628 1842 1848 2072 2149 2442 2456 2849 3108 3256 3377 3684 4298 4884 5698 6216 6447 6754 7368 8547 8596 9768 10131 11359 11396 12894 13508 17094 17192 20262 22718 22792 23639 25788 27016 34077 34188 40524 45436 47278 51576 68154 68376 70917 79513 81048 90872 94556 124949 136308 141834 159026 189112 238539 249898 272616 283668 318052 374847 477078 499796 567336 636104 749694 874643 954156 999592 1499388 1749286 1908312 2623929 2998776 3498572 5247858 6997144 10495716 20991432
• Sum of all divisors σ(n): 67415040
• Sum of proper divisors (its aliquot sum) s(n): 46423608
• 20991432 is an abundant number, because the sum of its proper divisors (46423608) is greater than itself. Its abundance is 25432176

Bases of 20991432

• Binary: 1010000000100110111001000₂
• Hexadecimal: 0x1404DC8
• Base-36: CHX3C

Squares and roots of 20991432

• 20991432 squared (20991432²) is 440640217410624
• 20991432 cubed (20991432³) is 9249669160240329773568
• The square root of 20991432 is 4581.6407541403
• The cube root of 20991432 is 275.8548911653

Scales and comparisons

• 20,991,432 seconds is equal to 34 weeks, 4 days, 22 hours, 57 minutes, 12 seconds.
• To count from 1 to 20,991,432 would take you about ten hours!

  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 20991432 cubic inches would be around 23 feet tall.

Recreational maths with 20991432

• 20991432 backwards is 23419902
• The number of decimal digits it has is: 8
• The sum of 20991432's digits is 30
• More coming soon!