21485142

Names of 21485142

• Cardinal: 21485142 can be written as Twenty-one million, four hundred eighty-five thousand, one hundred forty-two.

Scientific notation

• Scientific notation: 2.1485142 × 10⁷

Factors of 21485142

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 628

Divisors of 21485142

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 27 42 54 63 113 126 189 226 339 378 503 678 791 1006 1017 1509 1582 2034 2373 3018 3051 3521 4527 4746 6102 7042 7119 9054 10563 13581 14238 21126 21357 27162 31689 42714 56839 63378 95067 113678 170517 190134 341034 397873 511551 795746 1023102 1193619 1534653 2387238 3069306 3580857 7161714 10742571 21485142
• Sum of all divisors σ(n): 55157760
• Sum of proper divisors (its aliquot sum) s(n): 33672618
• 21485142 is an abundant number, because the sum of its proper divisors (33672618) is greater than itself. Its abundance is 12187476

Bases of 21485142

• Binary: 1010001111101011001010110₂
• Hexadecimal: 0x147D656
• Base-36: CSI1I

Squares and roots of 21485142

• 21485142 squared (21485142²) is 461611326760164
• 21485142 cubed (21485142³) is 9917784904250523483288
• The square root of 21485142 is 4635.2067915035
• The cube root of 21485142 is 278.0008194859

Scales and comparisons

• 21,485,142 seconds is equal to 35 weeks, 3 days, 16 hours, 5 minutes, 42 seconds.
• To count from 1 to 21,485,142 would take you about two days!

  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 21485142 cubic inches would be around 23.2 feet tall.

Recreational maths with 21485142

• 21485142 backwards is 24158412
• 21485142 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21485142's digits is 27
• More coming soon!