21424915

Names of 21424915

• Cardinal: 21424915 can be written as Twenty-one million, four hundred twenty-four thousand, nine hundred fifteen.

Scientific notation

• Scientific notation: 2.1424915 × 10⁷

Factors of 21424915

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 4229

Divisors of 21424915

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 1693 2531 8465 12655 4284983 21424915
• Sum of all divisors σ(n): 25735248
• Sum of proper divisors (its aliquot sum) s(n): 4310333
• 21424915 is a deficient number, because the sum of its proper divisors (4310333) is less than itself. Its deficiency is 17114582

Bases of 21424915

• Binary: 1010001101110101100010011₂
• Hexadecimal: 0x146EB13
• Base-36: CR7KJ

Squares and roots of 21424915

• 21424915 squared (21424915²) is 459026982757225
• 21424915 cubed (21424915³) is 9834614088280011260875
• The square root of 21424915 is 4628.7055425897
• The cube root of 21424915 is 277.7408130663

Scales and comparisons

• 21,424,915 seconds is equal to 35 weeks, 2 days, 23 hours, 21 minutes, 55 seconds.
• To count from 1 to 21,424,915 would take you about twenty-three 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 21424915 cubic inches would be around 23.1 feet tall.

Recreational maths with 21424915

• 21424915 backwards is 51942412
• The number of decimal digits it has is: 8
• The sum of 21424915's digits is 28
• More coming soon!