21764

Names of 21764

• Cardinal: 21764 can be written as Twenty-one thousand, seven hundred sixty-four.

Scientific notation

• Scientific notation: 2.1764 × 10⁴

Factors of 21764

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 5443

Divisors of 21764

• Number of divisors d(n): 6
• Complete list of divisors:
  1 2 4 5441 10882 21764
• Sum of all divisors σ(n): 38094
• Sum of proper divisors (its aliquot sum) s(n): 16330
• 21764 is a deficient number, because the sum of its proper divisors (16330) is less than itself. Its deficiency is 5434

Bases of 21764

• Binary: 101010100000100₂
• Hexadecimal: 0x5504
• Base-36: GSK

Squares and roots of 21764

• 21764 squared (21764²) is 473671696
• 21764 cubed (21764³) is 10308990791744
• The square root of 21764 is 147.5262688471
• The cube root of 21764 is 27.9198387523

Scales and comparisons

• 21,764 seconds is equal to 6 hours, 2 minutes, 44 seconds.
• To count from 1 to 21,764 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 21764 cubic inches would be around 2.3 feet tall.

Recreational maths with 21764

• 21764 backwards is 46712
• The number of decimal digits it has is: 5
• The sum of 21764's digits is 20
• More coming soon!