21164839

Names of 21164839

• Cardinal: 21164839 can be written as Twenty-one million, one hundred sixty-four thousand, eight hundred thirty-nine.

Scientific notation

• Scientific notation: 2.1164839 × 10⁷

Factors of 21164839

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21164839

Divisors of 21164839

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21164839
• Sum of all divisors σ(n): 21164840
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21164839 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21164838

Bases of 21164839

• Binary: 1010000101111001100100111₂
• Hexadecimal: 0x142F327
• Base-36: CLMW7

Squares and roots of 21164839

• 21164839 squared (21164839²) is 447950409895921
• 21164839 cubed (21164839³) is 9480798305431174721719
• The square root of 21164839 is 4600.5259481933
• The cube root of 21164839 is 276.6124073849

Scales and comparisons

• 21,164,839 seconds is equal to 34 weeks, 6 days, 23 hours, 7 minutes, 19 seconds.
• To count from 1 to 21,164,839 would take you about three 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 21164839 cubic inches would be around 23.1 feet tall.

Recreational maths with 21164839

• 21164839 backwards is 93846112
• The number of decimal digits it has is: 8
• The sum of 21164839's digits is 34
• More coming soon!