21494109

Names of 21494109

• Cardinal: 21494109 can be written as Twenty-one million, four hundred ninety-four thousand, one hundred nine.

Scientific notation

• Scientific notation: 2.1494109 × 10⁷

Factors of 21494109

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 1897

Divisors of 21494109

• Number of divisors d(n): 32
• Complete list of divisors:
  1 3 7 13 21 39 43 91 129 273 301 559 903 1677 1831 3913 5493 11739 12817 23803 38451 71409 78733 166621 236199 499863 551131 1023529 1653393 3070587 7164703 21494109
• Sum of all divisors σ(n): 36112384
• Sum of proper divisors (its aliquot sum) s(n): 14618275
• 21494109 is a deficient number, because the sum of its proper divisors (14618275) is less than itself. Its deficiency is 6875834

Bases of 21494109

• Binary: 1010001111111100101011101₂
• Hexadecimal: 0x147F95D
• Base-36: CSOYL

Squares and roots of 21494109

• 21494109 squared (21494109²) is 461996721703881
• 21494109 cubed (21494109³) is 9930207893945883937029
• The square root of 21494109 is 4636.1739613609
• The cube root of 21494109 is 278.0394894131

Scales and comparisons

• 21,494,109 seconds is equal to 35 weeks, 3 days, 18 hours, 35 minutes, 9 seconds.
• To count from 1 to 21,494,109 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 21494109 cubic inches would be around 23.2 feet tall.

Recreational maths with 21494109

• 21494109 backwards is 90149412
• The number of decimal digits it has is: 8
• The sum of 21494109's digits is 30
• More coming soon!