20813

Names of 20813

• Cardinal: 20813 can be written as Twenty thousand, eight hundred thirteen.

Scientific notation

• Scientific notation: 2.0813 × 10⁴

Factors of 20813

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 1614

Divisors of 20813

• Number of divisors d(n): 4
• Complete list of divisors:
  1 13 1601 20813
• Sum of all divisors σ(n): 22428
• Sum of proper divisors (its aliquot sum) s(n): 1615
• 20813 is a deficient number, because the sum of its proper divisors (1615) is less than itself. Its deficiency is 19198

Bases of 20813

• Binary: 101000101001101₂
• Hexadecimal: 0x514D
• Base-36: G25

Squares and roots of 20813

• 20813 squared (20813²) is 433180969
• 20813 cubed (20813³) is 9015795507797
• The square root of 20813 is 144.2671133697
• The cube root of 20813 is 27.5071056017

Scales and comparisons

• 20,813 seconds is equal to 5 hours, 46 minutes, 53 seconds.
• To count from 1 to 20,813 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 20813 cubic inches would be around 2.3 feet tall.

Recreational maths with 20813

• 20813 backwards is 31802
• The number of decimal digits it has is: 5
• The sum of 20813's digits is 14
• More coming soon!