20381

Names of 20381

• Cardinal: 20381 can be written as Twenty thousand, three hundred eighty-one.

Scientific notation

• Scientific notation: 2.0381 × 10⁴

Factors of 20381

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 318

Divisors of 20381

• Number of divisors d(n): 4
• Complete list of divisors:
  1 89 229 20381
• Sum of all divisors σ(n): 20700
• Sum of proper divisors (its aliquot sum) s(n): 319
• 20381 is a deficient number, because the sum of its proper divisors (319) is less than itself. Its deficiency is 20062

Bases of 20381

• Binary: 100111110011101₂
• Hexadecimal: 0x4F9D
• Base-36: FQ5

Squares and roots of 20381

• 20381 squared (20381²) is 415385161
• 20381 cubed (20381³) is 8465964966341
• The square root of 20381 is 142.7620397725
• The cube root of 20381 is 27.3154586021

Scales and comparisons

• 20,381 seconds is equal to 5 hours, 39 minutes, 41 seconds.
• To count from 1 to 20,381 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 20381 cubic inches would be around 2.3 feet tall.

Recreational maths with 20381

• 20381 backwards is 18302
• The number of decimal digits it has is: 5
• The sum of 20381's digits is 14
• More coming soon!