21000823

Names of 21000823

• Cardinal: 21000823 can be written as Twenty-one million, eight hundred twenty-three.

Scientific notation

• Scientific notation: 2.1000823 × 10⁷

Factors of 21000823

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21000823

Divisors of 21000823

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21000823
• Sum of all divisors σ(n): 21000824
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21000823 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21000822

Bases of 21000823

• Binary: 1010000000111001001110111₂
• Hexadecimal: 0x1407277
• Base-36: CI4C7

Squares and roots of 21000823

• 21000823 squared (21000823²) is 441034566677329
• 21000823 cubed (21000823³) is 9262088871672284441767
• The square root of 21000823 is 4582.6654907379
• The cube root of 21000823 is 275.8960217095

Scales and comparisons

• 21,000,823 seconds is equal to 34 weeks, 5 days, 1 hour, 33 minutes, 43 seconds.
• To count from 1 to 21,000,823 would take you about fourteen 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 21000823 cubic inches would be around 23 feet tall.

Recreational maths with 21000823

• 21000823 backwards is 32800012
• The number of decimal digits it has is: 8
• The sum of 21000823's digits is 16
• More coming soon!