21949

Names of 21949

• Cardinal: 21949 can be written as Twenty-one thousand, nine hundred forty-nine.

Scientific notation

• Scientific notation: 2.1949 × 10⁴

Factors of 21949

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 514

Divisors of 21949

• Number of divisors d(n): 4
• Complete list of divisors:
  1 47 467 21949
• Sum of all divisors σ(n): 22464
• Sum of proper divisors (its aliquot sum) s(n): 515
• 21949 is a deficient number, because the sum of its proper divisors (515) is less than itself. Its deficiency is 21434

Bases of 21949

• Binary: 101010110111101₂
• Hexadecimal: 0x55BD
• Base-36: GXP

Squares and roots of 21949

• 21949 squared (21949²) is 481758601
• 21949 cubed (21949³) is 10574119533349
• The square root of 21949 is 148.1519490253
• The cube root of 21949 is 27.9987244317

Scales and comparisons

• 21,949 seconds is equal to 6 hours, 5 minutes, 49 seconds.
• To count from 1 to 21,949 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 21949 cubic inches would be around 2.3 feet tall.

Recreational maths with 21949

• 21949 backwards is 94912
• The number of decimal digits it has is: 5
• The sum of 21949's digits is 25
• More coming soon!