21087297

Names of 21087297

• Cardinal: 21087297 can be written as Twenty-one million, eighty-seven thousand, two hundred ninety-seven.

Scientific notation

• Scientific notation: 2.1087297 × 10⁷

Factors of 21087297

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 44

Divisors of 21087297

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 11 21 23 27 33 49 63 69 77 81 99 147 161 189 207 231 243 253 297 343 441 483 539 567 621 693 759 891 1029 1127 1323 1449 1617 1701 1771 1863 2079 2277 2673 3087 3381 3773 3969 4347 4851 5313 5589 6237 6831 7889 9261 10143 11319 11907 12397 13041 14553 15939 18711 20493 23667 27783 30429 33957 37191 39123 43659 47817 61479 71001 83349 86779 91287 101871 111573 130977 143451 213003 260337 273861 305613 334719 430353 639009 781011 916839 1004157 1917027 2343033 3012471 7029099 21087297
• Sum of all divisors σ(n): 41932800
• Sum of proper divisors (its aliquot sum) s(n): 20845503
• 21087297 is a deficient number, because the sum of its proper divisors (20845503) is less than itself. Its deficiency is 241794

Bases of 21087297

• Binary: 1010000011100010001000001₂
• Hexadecimal: 0x141C441
• Base-36: CJZ29

Squares and roots of 21087297

• 21087297 squared (21087297²) is 444674094766209
• 21087297 cubed (21087297³) is 9376974704541194747073
• The square root of 21087297 is 4592.0907003237
• The cube root of 21087297 is 276.2741840515

Scales and comparisons

• 21,087,297 seconds is equal to 34 weeks, 6 days, 1 hour, 34 minutes, 57 seconds.
• To count from 1 to 21,087,297 would take you about two days!

  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 21087297 cubic inches would be around 23 feet tall.

Recreational maths with 21087297

• 21087297 backwards is 79278012
• The number of decimal digits it has is: 8
• The sum of 21087297's digits is 36
• More coming soon!