20091

Names of 20091

• Cardinal: 20091 can be written as Twenty thousand and ninety-one.

Scientific notation

• Scientific notation: 2.0091 × 10⁴

Factors of 20091

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 221

Divisors of 20091

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 37 111 181 543 6697 20091
• Sum of all divisors σ(n): 27664
• Sum of proper divisors (its aliquot sum) s(n): 7573
• 20091 is a deficient number, because the sum of its proper divisors (7573) is less than itself. Its deficiency is 12518

Bases of 20091

• Binary: 100111001111011₂
• Hexadecimal: 0x4E7B
• Base-36: FI3

Squares and roots of 20091

• 20091 squared (20091²) is 403648281
• 20091 cubed (20091³) is 8109697613571
• The square root of 20091 is 141.7427246811
• The cube root of 20091 is 27.1852825513

Scales and comparisons

• 20,091 seconds is equal to 5 hours, 34 minutes, 51 seconds.
• To count from 1 to 20,091 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 20091 cubic inches would be around 2.3 feet tall.

Recreational maths with 20091

• 20091 backwards is 19002
• The number of decimal digits it has is: 5
• The sum of 20091's digits is 12
• More coming soon!