# 21684

## 21,684 is an even composite number composed of four prime numbers multiplied together.

What does the number 21684 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 24 divisors.

21684 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of twenty-four divisors.

## Prime factorization of 21684:

### 22 × 3 × 13 × 139

(2 × 2 × 3 × 13 × 139)

See below for interesting mathematical facts about the number 21684 from the Numbermatics database.

### Names of 21684

• Cardinal: 21684 can be written as Twenty-one thousand, six hundred eighty-four.

### Scientific notation

• Scientific notation: 2.1684 × 104

### Factors of 21684

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 157

### Divisors of 21684

• Number of divisors d(n): 24
• Complete list of divisors:
• Sum of all divisors σ(n): 54880
• Sum of proper divisors (its aliquot sum) s(n): 33196
• 21684 is an abundant number, because the sum of its proper divisors (33196) is greater than itself. Its abundance is 11512

### Bases of 21684

• Binary: 1010100101101002
• Base-36: GQC

### Squares and roots of 21684

• 21684 squared (216842) is 470195856
• 21684 cubed (216843) is 10195726941504
• The square root of 21684 is 147.2548810736
• The cube root of 21684 is 27.8855875511

### Scales and comparisons

How big is 21684?
• 21,684 seconds is equal to 6 hours, 1 minute, 24 seconds.
• To count from 1 to 21,684 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 21684 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21684

• 21684 backwards is 48612
• The number of decimal digits it has is: 5
• The sum of 21684's digits is 21
• More coming soon!

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"Number 21684 - Facts about the integer". Numbermatics.com. 2022. Web. 20 January 2022.

APA style:
Numbermatics. (2022). Number 21684 - Facts about the integer. Retrieved 20 January 2022, from https://numbermatics.com/n/21684/

Chicago style:
Numbermatics. 2022. "Number 21684 - Facts about the integer". https://numbermatics.com/n/21684/

The information we have on file for 21684 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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