21017

Names of 21017

• Cardinal: 21017 can be written as Twenty-one thousand and seventeen.

Scientific notation

• Scientific notation: 2.1017 × 10⁴

Factors of 21017

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21017

Divisors of 21017

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21017
• Sum of all divisors σ(n): 21018
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21017 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21016

Bases of 21017

• Binary: 101001000011001₂
• Hexadecimal: 0x5219
• Base-36: G7T

Squares and roots of 21017

• 21017 squared (21017²) is 441714289
• 21017 cubed (21017³) is 9283509211913
• The square root of 21017 is 144.9724111685
• The cube root of 21017 is 27.5966844719

Scales and comparisons

• 21,017 seconds is equal to 5 hours, 50 minutes, 17 seconds.
• To count from 1 to 21,017 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 21017 cubic inches would be around 2.3 feet tall.

Recreational maths with 21017

• 21017 backwards is 71012
• 21017 is a twin prime! Its twin is 21019
• The number of decimal digits it has is: 5
• The sum of 21017's digits is 11
• More coming soon!