21009960

Names of 21009960

• Cardinal: 21009960 can be written as Twenty-one million, nine thousand, nine hundred sixty.

Scientific notation

• Scientific notation: 2.100996 × 10⁷

Factors of 21009960

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3460

Divisors of 21009960

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 17 18 20 24 30 34 36 40 45 51 60 68 72 85 90 102 120 136 153 170 180 204 255 306 340 360 408 510 612 680 765 1020 1224 1530 2040 3060 3433 6120 6866 10299 13732 17165 20598 27464 30897 34330 41196 51495 58361 61794 68660 82392 102990 116722 123588 137320 154485 175083 205980 233444 247176 291805 308970 350166 411960 466888 525249 583610 617940 700332 875415 1050498 1167220 1235880 1400664 1750830 2100996 2334440 2626245 3501660 4201992 5252490 7003320 10504980 21009960
• Sum of all divisors σ(n): 72320040
• Sum of proper divisors (its aliquot sum) s(n): 51310080
• 21009960 is an abundant number, because the sum of its proper divisors (51310080) is greater than itself. Its abundance is 30300120

Bases of 21009960

• Binary: 1010000001001011000101000₂
• Hexadecimal: 0x1409628
• Base-36: CIBE0

Squares and roots of 21009960

• 21009960 squared (21009960²) is 441418419201600
• 21009960 cubed (21009960³) is 9274183330688847936000
• The square root of 21009960 is 4583.6622912253
• The cube root of 21009960 is 275.9360280217

Scales and comparisons

• 21,009,960 seconds is equal to 34 weeks, 5 days, 4 hours, 6 minutes.
• To count from 1 to 21,009,960 would take you about eighteen 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 21009960 cubic inches would be around 23 feet tall.

Recreational maths with 21009960

• 21009960 backwards is 06990012
• The number of decimal digits it has is: 8
• The sum of 21009960's digits is 27
• More coming soon!