20509

Names of 20509

• Cardinal: 20509 can be written as Twenty thousand, five hundred nine.

Scientific notation

• Scientific notation: 2.0509 × 10⁴

Factors of 20509

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 20509

Divisors of 20509

• Number of divisors d(n): 2
• Complete list of divisors:
  1 20509
• Sum of all divisors σ(n): 20510
• Sum of proper divisors (its aliquot sum) s(n): 1
• 20509 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 20508

Bases of 20509

• Binary: 101000000011101₂
• Hexadecimal: 0x501D
• Base-36: FTP

Squares and roots of 20509

• 20509 squared (20509²) is 420619081
• 20509 cubed (20509³) is 8626476732229
• The square root of 20509 is 143.2096365473
• The cube root of 20509 is 27.3725229371

Scales and comparisons

• 20,509 seconds is equal to 5 hours, 41 minutes, 49 seconds.
• To count from 1 to 20,509 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 20509 cubic inches would be around 2.3 feet tall.

Recreational maths with 20509

• 20509 backwards is 90502
• The number of decimal digits it has is: 5
• The sum of 20509's digits is 16
• More coming soon!