21051940

Names of 21051940

• Cardinal: 21051940 can be written as Twenty-one million, fifty-one thousand, nine hundred forty.

Scientific notation

• Scientific notation: 2.105194 × 10⁷

Factors of 21051940

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 339

Divisors of 21051940

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 10 13 14 20 26 28 35 43 52 65 70 86 91 130 140 172 182 215 260 269 301 364 430 455 538 559 602 860 910 1076 1118 1204 1345 1505 1820 1883 2236 2690 2795 3010 3497 3766 3913 5380 5590 6020 6994 7532 7826 9415 11180 11567 13988 15652 17485 18830 19565 23134 24479 34970 37660 39130 46268 48958 57835 69940 78260 80969 97916 115670 122395 150371 161938 231340 244790 300742 323876 404845 489580 601484 751855 809690 1052597 1503710 1619380 2105194 3007420 4210388 5262985 10525970 21051940
• Sum of all divisors σ(n): 55883520
• Sum of proper divisors (its aliquot sum) s(n): 34831580
• 21051940 is an abundant number, because the sum of its proper divisors (34831580) is greater than itself. Its abundance is 13779640

Bases of 21051940

• Binary: 1010000010011101000100100₂
• Hexadecimal: 0x1413A24
• Base-36: CJ7S4

Squares and roots of 21051940

• 21051940 squared (21051940²) is 443184177763600
• 21051940 cubed (21051940³) is 9329886719228641384000
• The square root of 21051940 is 4588.2393137237
• The cube root of 21051940 is 276.1196883399

Scales and comparisons

• 21,051,940 seconds is equal to 34 weeks, 5 days, 15 hours, 45 minutes, 40 seconds.
• To count from 1 to 21,051,940 would take you about eleven 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 21051940 cubic inches would be around 23 feet tall.

Recreational maths with 21051940

• 21051940 backwards is 04915012
• The number of decimal digits it has is: 8
• The sum of 21051940's digits is 22
• More coming soon!