21129308

Names of 21129308

• Cardinal: 21129308 can be written as Twenty-one million, one hundred twenty-nine thousand, three hundred eight.

Scientific notation

• Scientific notation: 2.1129308 × 10⁷

Factors of 21129308

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 5282329

Divisors of 21129308

• Number of divisors d(n): 6
• Complete list of divisors:
  1 2 4 5282327 10564654 21129308
• Sum of all divisors σ(n): 36976296
• Sum of proper divisors (its aliquot sum) s(n): 15846988
• 21129308 is a deficient number, because the sum of its proper divisors (15846988) is less than itself. Its deficiency is 5282320

Bases of 21129308

• Binary: 1010000100110100001011100₂
• Hexadecimal: 0x142685C
• Base-36: CKVH8

Squares and roots of 21129308

• 21129308 squared (21129308²) is 446447656558864
• 21129308 cubed (21129308³) is 9433130041310457586112
• The square root of 21129308 is 4596.6627024397
• The cube root of 21129308 is 276.4575306981

Scales and comparisons

• 21,129,308 seconds is equal to 34 weeks, 6 days, 13 hours, 15 minutes, 8 seconds.
• To count from 1 to 21,129,308 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 21129308 cubic inches would be around 23 feet tall.

Recreational maths with 21129308

• 21129308 backwards is 80392112
• The number of decimal digits it has is: 8
• The sum of 21129308's digits is 26
• More coming soon!