20989

Names of 20989

• Cardinal: 20989 can be written as Twenty thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 2.0989 × 10⁴

Factors of 20989

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 290

Divisors of 20989

• Number of divisors d(n): 4
• Complete list of divisors:
  1 139 151 20989
• Sum of all divisors σ(n): 21280
• Sum of proper divisors (its aliquot sum) s(n): 291
• 20989 is a deficient number, because the sum of its proper divisors (291) is less than itself. Its deficiency is 20698

Bases of 20989

• Binary: 101000111111101₂
• Hexadecimal: 0x51FD
• Base-36: G71

Squares and roots of 20989

• 20989 squared (20989²) is 440538121
• 20989 cubed (20989³) is 9246454621669
• The square root of 20989 is 144.8758088847
• The cube root of 20989 is 27.5844237533

Scales and comparisons

• 20,989 seconds is equal to 5 hours, 49 minutes, 49 seconds.
• To count from 1 to 20,989 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 20989 cubic inches would be around 2.3 feet tall.

Recreational maths with 20989

• 20989 backwards is 98902
• The number of decimal digits it has is: 5
• The sum of 20989's digits is 28
• More coming soon!