21100

Names of 21100

• Cardinal: 21100 can be written as Twenty-one thousand, one hundred.

Scientific notation

• Scientific notation: 2.11 × 10⁴

Factors of 21100

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 218

Divisors of 21100

• Number of divisors d(n): 18
• Complete list of divisors:
  1 2 4 5 10 20 25 50 100 211 422 844 1055 2110 4220 5275 10550 21100
• Sum of all divisors σ(n): 46004
• Sum of proper divisors (its aliquot sum) s(n): 24904
• 21100 is an abundant number, because the sum of its proper divisors (24904) is greater than itself. Its abundance is 3804

Bases of 21100

• Binary: 101001001101100₂
• Hexadecimal: 0x526C
• Base-36: GA4

Squares and roots of 21100

• 21100 squared (21100²) is 445210000
• 21100 cubed (21100³) is 9393931000000
• The square root of 21100 is 145.2583904633
• The cube root of 21100 is 27.6329648825

Scales and comparisons

• 21,100 seconds is equal to 5 hours, 51 minutes, 40 seconds.
• To count from 1 to 21,100 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 21100 cubic inches would be around 2.3 feet tall.

Recreational maths with 21100

• 21100 backwards is 00112
• 21100 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 21100's digits is 4
• More coming soon!