21004947

21,004,947 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21004947 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 16 divisors.

21004947 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21004947:

3³ × 73 × 10657

(3 × 3 × 3 × 73 × 10657)

See below for interesting mathematical facts about the number 21004947 from the Numbermatics database.

Names of 21004947

Cardinal: 21004947 can be written as Twenty-one million, four thousand, nine hundred forty-seven.

Scientific notation

Scientific notation: 2.1004947 × 10⁷

Factors of 21004947

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 5
Sum of prime factors: 10733

Divisors of 21004947

Number of divisors d(n): 16
Complete list of divisors:
1 3 9 27 73 219 657 1971 10657 31971 95913 287739 777961 2333883 7001649 21004947
Sum of all divisors σ(n): 31547680
Sum of proper divisors (its aliquot sum) s(n): 10542733
21004947 is a deficient number, because the sum of its proper divisors (10542733) is less than itself. Its deficiency is 10462214

Bases of 21004947

Binary: 1010000001000001010010011₂
Hexadecimal: 0x1408293
Base-36: CI7IR

Squares and roots of 21004947

21004947 squared (21004947²) is 441207798472809
21004947 cubed (21004947³) is 9267546422908033986123
The square root of 21004947 is 4583.1154251229
The cube root of 21004947 is 275.9140800609

Scales and comparisons

How big is 21004947?

21,004,947 seconds is equal to 34 weeks, 5 days, 2 hours, 42 minutes, 27 seconds.
To count from 1 to 21,004,947 would take you about sixteen 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 21004947 cubic inches would be around 23 feet tall.

Recreational maths with 21004947

21004947 backwards is 74940012
21004947 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 21004947's digits is 27
More coming soon!

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The information we have on file for 21004947 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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