21060018

Names of 21060018

• Cardinal: 21060018 can be written as Twenty-one million, sixty thousand and eighteen.

Scientific notation

• Scientific notation: 2.1060018 × 10⁷

Factors of 21060018

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 494

Divisors of 21060018

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 6 7 9 14 18 19 21 38 42 57 63 114 126 133 171 266 342 361 399 463 722 798 926 1083 1197 1389 2166 2394 2527 2778 3241 3249 4167 5054 6482 6498 7581 8334 8797 9723 15162 17594 19446 22743 26391 29169 45486 52782 58338 61579 79173 123158 158346 167143 184737 334286 369474 501429 554211 1002858 1108422 1170001 1504287 2340002 3008574 3510003 7020006 10530009 21060018
• Sum of all divisors σ(n): 55156608
• Sum of proper divisors (its aliquot sum) s(n): 34096590
• 21060018 is an abundant number, because the sum of its proper divisors (34096590) is greater than itself. Its abundance is 13036572

Bases of 21060018

• Binary: 1010000010101100110110010₂
• Hexadecimal: 0x14159B2
• Base-36: CJE0I

Squares and roots of 21060018

• 21060018 squared (21060018²) is 443524358160324
• 21060018 cubed (21060018³) is 9340630966294870325832
• The square root of 21060018 is 4589.1195233945
• The cube root of 21060018 is 276.1550011521

Scales and comparisons

• 21,060,018 seconds is equal to 34 weeks, 5 days, 18 hours, 18 seconds.
• To count from 1 to 21,060,018 would take you about fifteen 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 21060018 cubic inches would be around 23 feet tall.

Recreational maths with 21060018

• 21060018 backwards is 81006012
• 21060018 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21060018's digits is 18
• More coming soon!