20808

Names of 20808

• Cardinal: 20808 can be written as Twenty thousand, eight hundred eight.

Scientific notation

• Scientific notation: 2.0808 × 10⁴

Factors of 20808

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 22

Divisors of 20808

• Number of divisors d(n): 36
• Complete list of divisors:
  1 2 3 4 6 8 9 12 17 18 24 34 36 51 68 72 102 136 153 204 289 306 408 578 612 867 1156 1224 1734 2312 2601 3468 5202 6936 10404 20808
• Sum of all divisors σ(n): 59865
• Sum of proper divisors (its aliquot sum) s(n): 39057
• 20808 is an abundant number, because the sum of its proper divisors (39057) is greater than itself. Its abundance is 18249

Bases of 20808

• Binary: 101000101001000₂
• Hexadecimal: 0x5148
• Base-36: G20

Squares and roots of 20808

• 20808 squared (20808²) is 432972864
• 20808 cubed (20808³) is 9009299354112
• The square root of 20808 is 144.2497833621
• The cube root of 20808 is 27.5049027071

Scales and comparisons

• 20,808 seconds is equal to 5 hours, 46 minutes, 48 seconds.
• To count from 1 to 20,808 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 20808 cubic inches would be around 2.3 feet tall.

Recreational maths with 20808

• 20808 backwards is 80802
• 20808 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 20808's digits is 18
• More coming soon!