21916

Names of 21916

• Cardinal: 21916 can be written as Twenty-one thousand, nine hundred sixteen.

Scientific notation

• Scientific notation: 2.1916 × 10⁴

Factors of 21916

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 5481

Divisors of 21916

• Number of divisors d(n): 6
• Complete list of divisors:
  1 2 4 5479 10958 21916
• Sum of all divisors σ(n): 38360
• Sum of proper divisors (its aliquot sum) s(n): 16444
• 21916 is a deficient number, because the sum of its proper divisors (16444) is less than itself. Its deficiency is 5472

Bases of 21916

• Binary: 101010110011100₂
• Hexadecimal: 0x559C
• Base-36: GWS

Squares and roots of 21916

• 21916 squared (21916²) is 480311056
• 21916 cubed (21916³) is 10526497103296
• The square root of 21916 is 148.0405349895
• The cube root of 21916 is 27.9846855029

Scales and comparisons

• 21,916 seconds is equal to 6 hours, 5 minutes, 16 seconds.
• To count from 1 to 21,916 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 21916 cubic inches would be around 2.3 feet tall.

Recreational maths with 21916

• 21916 backwards is 61912
• The number of decimal digits it has is: 5
• The sum of 21916's digits is 19
• More coming soon!