21742987

21,742,987 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21742987 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

21742987 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 21742987:

7 × 131² × 181

(7 × 131 × 131 × 181)

See below for interesting mathematical facts about the number 21742987 from the Numbermatics database.

Names of 21742987

Cardinal: 21742987 can be written as Twenty-one million, seven hundred forty-two thousand, nine hundred eighty-seven.

Scientific notation

Scientific notation: 2.1742987 × 10⁷

Factors of 21742987

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 319

Divisors of 21742987

Number of divisors d(n): 12
Complete list of divisors:
1 7 131 181 917 1267 17161 23711 120127 165977 3106141 21742987
Sum of all divisors σ(n): 25178608
Sum of proper divisors (its aliquot sum) s(n): 3435621
21742987 is a deficient number, because the sum of its proper divisors (3435621) is less than itself. Its deficiency is 18307366

Bases of 21742987

Binary: 1010010111100010110001011₂
Hexadecimal: 0x14BC58B
Base-36: CY0ZV

Squares and roots of 21742987

21742987 squared (21742987²) is 472757483682169
21742987 cubed (21742987³) is 10279159821854112698803
The square root of 21742987 is 4662.9375934061
The cube root of 21742987 is 279.1085038503

Scales and comparisons

How big is 21742987?

21,742,987 seconds is equal to 35 weeks, 6 days, 15 hours, 43 minutes, 7 seconds.
To count from 1 to 21,742,987 would take you about six 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 21742987 cubic inches would be around 23.3 feet tall.

Recreational maths with 21742987

21742987 backwards is 78924712
The number of decimal digits it has is: 8
The sum of 21742987's digits is 40
More coming soon!

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The information we have on file for 21742987 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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