21128023

Names of 21128023

• Cardinal: 21128023 can be written as Twenty-one million, one hundred twenty-eight thousand and twenty-three.

Scientific notation

• Scientific notation: 2.1128023 × 10⁷

Factors of 21128023

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 3018296

Divisors of 21128023

• Number of divisors d(n): 4
• Complete list of divisors:
  1 7 3018289 21128023
• Sum of all divisors σ(n): 24146320
• Sum of proper divisors (its aliquot sum) s(n): 3018297
• 21128023 is a deficient number, because the sum of its proper divisors (3018297) is less than itself. Its deficiency is 18109726

Bases of 21128023

• Binary: 1010000100110001101010111₂
• Hexadecimal: 0x1426357
• Base-36: CKUHJ

Squares and roots of 21128023

• 21128023 squared (21128023²) is 446393355888529
• 21128023 cubed (21128023³) is 9431409090260026148167
• The square root of 21128023 is 4596.5229249945
• The cube root of 21128023 is 276.4519262375

Scales and comparisons

• 21,128,023 seconds is equal to 34 weeks, 6 days, 12 hours, 53 minutes, 43 seconds.
• To count from 1 to 21,128,023 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 21128023 cubic inches would be around 23 feet tall.

Recreational maths with 21128023

• 21128023 backwards is 32082112
• The number of decimal digits it has is: 8
• The sum of 21128023's digits is 19
• More coming soon!