# 21316

## 21,316 is an even composite number composed of two prime numbers multiplied together.

What does the number 21316 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 9 divisors.

21316 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of nine divisors.

## Prime factorization of 21316:

### 22 × 732

(2 × 2 × 73 × 73)

See below for interesting mathematical facts about the number 21316 from the Numbermatics database.

### Names of 21316

• Cardinal: 21316 can be written as Twenty-one thousand, three hundred sixteen.

### Scientific notation

• Scientific notation: 2.1316 × 104

### Factors of 21316

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 75

### Divisors of 21316

• Number of divisors d(n): 9
• Complete list of divisors:
• Sum of all divisors σ(n): 37821
• Sum of proper divisors (its aliquot sum) s(n): 16505
• 21316 is a deficient number, because the sum of its proper divisors (16505) is less than itself. Its deficiency is 4811

### Bases of 21316

• Binary: 1010011010001002
• Base-36: GG4

### Squares and roots of 21316

• 21316 squared (213162) is 454371856
• 21316 cubed (213163) is 9685390482496
• 21316 is a perfect square number. Its square root is 146
• The cube root of 21316 is 27.7269375249

### Scales and comparisons

How big is 21316?
• 21,316 seconds is equal to 5 hours, 55 minutes, 16 seconds.
• To count from 1 to 21,316 would take you about five 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 21316 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21316

• 21316 backwards is 61312
• The number of decimal digits it has is: 5
• The sum of 21316's digits is 13
• More coming soon!