20665

Names of 20665

• Cardinal: 20665 can be written as Twenty thousand, six hundred sixty-five.

Scientific notation

• Scientific notation: 2.0665 × 10⁴

Factors of 20665

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 4138

Divisors of 20665

• Number of divisors d(n): 4
• Complete list of divisors:
  1 5 4133 20665
• Sum of all divisors σ(n): 24804
• Sum of proper divisors (its aliquot sum) s(n): 4139
• 20665 is a deficient number, because the sum of its proper divisors (4139) is less than itself. Its deficiency is 16526

Bases of 20665

• Binary: 101000010111001₂
• Hexadecimal: 0x50B9
• Base-36: FY1

Squares and roots of 20665

• 20665 squared (20665²) is 427042225
• 20665 cubed (20665³) is 8824827579625
• The square root of 20665 is 143.7532608325
• The cube root of 20665 is 27.4417499811

Scales and comparisons

• 20,665 seconds is equal to 5 hours, 44 minutes, 25 seconds.
• To count from 1 to 20,665 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 20665 cubic inches would be around 2.3 feet tall.

Recreational maths with 20665

• 20665 backwards is 56602
• The number of decimal digits it has is: 5
• The sum of 20665's digits is 19
• More coming soon!