21481

Names of 21481

• Cardinal: 21481 can be written as Twenty-one thousand, four hundred eighty-one.

Scientific notation

• Scientific notation: 2.1481 × 10⁴

Factors of 21481

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21481

Divisors of 21481

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21481
• Sum of all divisors σ(n): 21482
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21481 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21480

Bases of 21481

• Binary: 101001111101001₂
• Hexadecimal: 0x53E9
• Base-36: GKP

Squares and roots of 21481

• 21481 squared (21481²) is 461433361
• 21481 cubed (21481³) is 9912050027641
• The square root of 21481 is 146.5639792037
• The cube root of 21481 is 27.7982953599

Scales and comparisons

• 21,481 seconds is equal to 5 hours, 58 minutes, 1 second.
• To count from 1 to 21,481 would take you about five 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 21481 cubic inches would be around 2.3 feet tall.

Recreational maths with 21481

• 21481 backwards is 18412
• The number of decimal digits it has is: 5
• The sum of 21481's digits is 16
• More coming soon!