21417990

Names of 21417990

• Cardinal: 21417990 can be written as Twenty-one million, four hundred seventeen thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.141799 × 10⁷

Factors of 21417990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1645

Divisors of 21417990

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 10 11 15 22 30 33 41 55 66 82 110 123 165 205 246 330 410 451 615 902 1230 1353 1583 2255 2706 3166 4510 4749 6765 7915 9498 13530 15830 17413 23745 34826 47490 52239 64903 87065 104478 129806 174130 194709 261195 324515 389418 522390 649030 713933 973545 1427866 1947090 2141799 3569665 4283598 7139330 10708995 21417990
• Sum of all divisors σ(n): 57480192
• Sum of proper divisors (its aliquot sum) s(n): 36062202
• 21417990 is an abundant number, because the sum of its proper divisors (36062202) is greater than itself. Its abundance is 14644212

Bases of 21417990

• Binary: 1010001101101000000000110₂
• Hexadecimal: 0x146D006
• Base-36: CR286

Squares and roots of 21417990

• 21417990 squared (21417990²) is 458730295640100
• 21417990 cubed (21417990³) is 9825080884716705399000
• The square root of 21417990 is 4627.9574328207
• The cube root of 21417990 is 277.7108858781

Scales and comparisons

• 21,417,990 seconds is equal to 35 weeks, 2 days, 21 hours, 26 minutes, 30 seconds.
• To count from 1 to 21,417,990 would take you about twenty 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 21417990 cubic inches would be around 23.1 feet tall.

Recreational maths with 21417990

• 21417990 backwards is 09971412
• 21417990 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21417990's digits is 33
• More coming soon!