21929

Names of 21929

• Cardinal: 21929 can be written as Twenty-one thousand, nine hundred twenty-nine.

Scientific notation

• Scientific notation: 2.1929 × 10⁴

Factors of 21929

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21929

Divisors of 21929

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21929
• Sum of all divisors σ(n): 21930
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21929 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21928

Bases of 21929

• Binary: 101010110101001₂
• Hexadecimal: 0x55A9
• Base-36: GX5

Squares and roots of 21929

• 21929 squared (21929²) is 480881041
• 21929 cubed (21929³) is 10545240348089
• The square root of 21929 is 148.0844353739
• The cube root of 21929 is 27.9902176711

Scales and comparisons

• 21,929 seconds is equal to 6 hours, 5 minutes, 29 seconds.
• To count from 1 to 21,929 would take you about six 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 21929 cubic inches would be around 2.3 feet tall.

Recreational maths with 21929

• 21929 backwards is 92912
• The number of decimal digits it has is: 5
• The sum of 21929's digits is 23
• More coming soon!