21995142

Names of 21995142

• Cardinal: 21995142 can be written as Twenty-one million, nine hundred ninety-five thousand, one hundred forty-two.

Scientific notation

• Scientific notation: 2.1995142 × 10⁷

Factors of 21995142

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 282007

Divisors of 21995142

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 6 13 26 39 78 281989 563978 845967 1691934 3665857 7331714 10997571 21995142
• Sum of all divisors σ(n): 47374320
• Sum of proper divisors (its aliquot sum) s(n): 25379178
• 21995142 is an abundant number, because the sum of its proper divisors (25379178) is greater than itself. Its abundance is 3384036

Bases of 21995142

• Binary: 1010011111001111010000110₂
• Hexadecimal: 0x14F9E86
• Base-36: D3FK6

Squares and roots of 21995142

• 21995142 squared (21995142²) is 483786271600164
• 21995142 cubed (21995142³) is 10640947741496174403288
• The square root of 21995142 is 4689.8978666917
• The cube root of 21995142 is 280.1833068395

Scales and comparisons

• 21,995,142 seconds is equal to 36 weeks, 2 days, 13 hours, 45 minutes, 42 seconds.
• To count from 1 to 21,995,142 would take you about two weeks!

  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 21995142 cubic inches would be around 23.3 feet tall.

Recreational maths with 21995142

• 21995142 backwards is 24159912
• The number of decimal digits it has is: 8
• The sum of 21995142's digits is 33
• More coming soon!