21842

Names of 21842

• Cardinal: 21842 can be written as Twenty-one thousand, eight hundred forty-two.

Scientific notation

• Scientific notation: 2.1842 × 10⁴

Factors of 21842

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 232

Divisors of 21842

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 67 134 163 326 10921 21842
• Sum of all divisors σ(n): 33456
• Sum of proper divisors (its aliquot sum) s(n): 11614
• 21842 is a deficient number, because the sum of its proper divisors (11614) is less than itself. Its deficiency is 10228

Bases of 21842

• Binary: 101010101010010₂
• Hexadecimal: 0x5552
• Base-36: GUQ

Squares and roots of 21842

• 21842 squared (21842²) is 477072964
• 21842 cubed (21842³) is 10420227679688
• The square root of 21842 is 147.7903921099
• The cube root of 21842 is 27.9531529561

Scales and comparisons

• 21,842 seconds is equal to 6 hours, 4 minutes, 2 seconds.
• To count from 1 to 21,842 would take you about six 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 21842 cubic inches would be around 2.3 feet tall.

Recreational maths with 21842

• 21842 backwards is 24812
• The number of decimal digits it has is: 5
• The sum of 21842's digits is 17
• More coming soon!