20986

Names of 20986

• Cardinal: 20986 can be written as Twenty thousand, nine hundred eighty-six.

Scientific notation

• Scientific notation: 2.0986 × 10⁴

Factors of 20986

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1508

Divisors of 20986

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 7 14 1499 2998 10493 20986
• Sum of all divisors σ(n): 36000
• Sum of proper divisors (its aliquot sum) s(n): 15014
• 20986 is a deficient number, because the sum of its proper divisors (15014) is less than itself. Its deficiency is 5972

Bases of 20986

• Binary: 101000111111010₂
• Hexadecimal: 0x51FA
• Base-36: G6Y

Squares and roots of 20986

• 20986 squared (20986²) is 440412196
• 20986 cubed (20986³) is 9242490345256
• The square root of 20986 is 144.8654548193
• The cube root of 20986 is 27.5831094583

Scales and comparisons

• 20,986 seconds is equal to 5 hours, 49 minutes, 46 seconds.
• To count from 1 to 20,986 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 20986 cubic inches would be around 2.3 feet tall.

Recreational maths with 20986

• 20986 backwards is 68902
• The number of decimal digits it has is: 5
• The sum of 20986's digits is 25
• More coming soon!