21418

Names of 21418

• Cardinal: 21418 can be written as Twenty-one thousand, four hundred eighteen.

Scientific notation

• Scientific notation: 2.1418 × 10⁴

Factors of 21418

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 10711

Divisors of 21418

• Number of divisors d(n): 4
• Complete list of divisors:
  1 2 10709 21418
• Sum of all divisors σ(n): 32130
• Sum of proper divisors (its aliquot sum) s(n): 10712
• 21418 is a deficient number, because the sum of its proper divisors (10712) is less than itself. Its deficiency is 10706

Bases of 21418

• Binary: 101001110101010₂
• Hexadecimal: 0x53AA
• Base-36: GIY

Squares and roots of 21418

• 21418 squared (21418²) is 458730724
• 21418 cubed (21418³) is 9825094646632
• The square root of 21418 is 146.3488981851
• The cube root of 21418 is 27.7710929099

Scales and comparisons

• 21,418 seconds is equal to 5 hours, 56 minutes, 58 seconds.
• To count from 1 to 21,418 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 21418 cubic inches would be around 2.3 feet tall.

Recreational maths with 21418

• 21418 backwards is 81412
• The number of decimal digits it has is: 5
• The sum of 21418's digits is 16
• More coming soon!