20931

Names of 20931

• Cardinal: 20931 can be written as Twenty thousand, nine hundred thirty-one.

Scientific notation

• Scientific notation: 2.0931 × 10⁴

Factors of 20931

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 6980

Divisors of 20931

• Number of divisors d(n): 4
• Complete list of divisors:
  1 3 6977 20931
• Sum of all divisors σ(n): 27912
• Sum of proper divisors (its aliquot sum) s(n): 6981
• 20931 is a deficient number, because the sum of its proper divisors (6981) is less than itself. Its deficiency is 13950

Bases of 20931

• Binary: 101000111000011₂
• Hexadecimal: 0x51C3
• Base-36: G5F

Squares and roots of 20931

• 20931 squared (20931²) is 438106761
• 20931 cubed (20931³) is 9170012614491
• The square root of 20931 is 144.6754989627
• The cube root of 20931 is 27.5589918203

Scales and comparisons

• 20,931 seconds is equal to 5 hours, 48 minutes, 51 seconds.
• To count from 1 to 20,931 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 20931 cubic inches would be around 2.3 feet tall.

Recreational maths with 20931

• 20931 backwards is 13902
• The number of decimal digits it has is: 5
• The sum of 20931's digits is 15
• More coming soon!