20800

Names of 20800

• Cardinal: 20800 can be written as Twenty thousand, eight hundred.

Scientific notation

• Scientific notation: 2.08 × 10⁴

Factors of 20800

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 20

Divisors of 20800

• Number of divisors d(n): 42
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 25 26 32 40 50 52 64 65 80 100 104 130 160 200 208 260 320 325 400 416 520 650 800 832 1040 1300 1600 2080 2600 4160 5200 10400 20800
• Sum of all divisors σ(n): 55118
• Sum of proper divisors (its aliquot sum) s(n): 34318
• 20800 is an abundant number, because the sum of its proper divisors (34318) is greater than itself. Its abundance is 13518

Bases of 20800

• Binary: 101000101000000₂
• Hexadecimal: 0x5140
• Base-36: G1S

Squares and roots of 20800

• 20800 squared (20800²) is 432640000
• 20800 cubed (20800³) is 8998912000000
• The square root of 20800 is 144.2220510185
• The cube root of 20800 is 27.5013773415

Scales and comparisons

• 20,800 seconds is equal to 5 hours, 46 minutes, 40 seconds.
• To count from 1 to 20,800 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 20800 cubic inches would be around 2.3 feet tall.

Recreational maths with 20800

• 20800 backwards is 00802
• 20800 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 20800's digits is 10
• More coming soon!