21375090

Names of 21375090

• Cardinal: 21375090 can be written as Twenty-one million, three hundred seventy-five thousand and ninety.

Scientific notation

• Scientific notation: 2.137509 × 10⁷

Factors of 21375090

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2420

Divisors of 21375090

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 5 6 9 10 11 15 18 22 27 30 33 45 54 55 66 81 90 99 110 135 162 165 198 270 297 330 405 495 594 810 891 990 1485 1782 2399 2970 4455 4798 7197 8910 11995 14394 21591 23990 26389 35985 43182 52778 64773 71970 79167 107955 129546 131945 158334 194319 215910 237501 263890 323865 388638 395835 475002 647730 712503 791670 971595 1187505 1425006 1943190 2137509 2375010 3562515 4275018 7125030 10687545 21375090
• Sum of all divisors σ(n): 62726400
• Sum of proper divisors (its aliquot sum) s(n): 41351310
• 21375090 is an abundant number, because the sum of its proper divisors (41351310) is greater than itself. Its abundance is 19976220

Bases of 21375090

• Binary: 1010001100010100001110010₂
• Hexadecimal: 0x1462872
• Base-36: CQ54I

Squares and roots of 21375090

• 21375090 squared (21375090²) is 456894472508100
• 21375090 cubed (21375090³) is 9766160470363163229000
• The square root of 21375090 is 4623.3202355019
• The cube root of 21375090 is 277.5253446537

Scales and comparisons

• 21,375,090 seconds is equal to 35 weeks, 2 days, 9 hours, 31 minutes, 30 seconds.
• To count from 1 to 21,375,090 would take you about two 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 21375090 cubic inches would be around 23.1 feet tall.

Recreational maths with 21375090

• 21375090 backwards is 09057312
• 21375090 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21375090's digits is 27
• More coming soon!