# 21384

## 21,384 is an even composite number composed of three prime numbers multiplied together.

What does the number 21384 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 48 divisors.

21384 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of forty-eight divisors.

## Prime factorization of 21384:

### 23 × 35 × 11

(2 × 2 × 2 × 3 × 3 × 3 × 3 × 3 × 11)

See below for interesting mathematical facts about the number 21384 from the Numbermatics database.

### Names of 21384

• Cardinal: 21384 can be written as Twenty-one thousand, three hundred eighty-four.

### Scientific notation

• Scientific notation: 2.1384 × 104

### Factors of 21384

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 16

### Divisors of 21384

• Number of divisors d(n): 48
• Complete list of divisors:
• Sum of all divisors σ(n): 65520
• Sum of proper divisors (its aliquot sum) s(n): 44136
• 21384 is an abundant number, because the sum of its proper divisors (44136) is greater than itself. Its abundance is 22752

### Bases of 21384

• Binary: 1010011100010002
• Base-36: GI0

### Squares and roots of 21384

• 21384 squared (213842) is 457275456
• 21384 cubed (213843) is 9778378351104
• The square root of 21384 is 146.2326912835
• The cube root of 21384 is 27.7563900551

### Scales and comparisons

How big is 21384?
• 21,384 seconds is equal to 5 hours, 56 minutes, 24 seconds.
• To count from 1 to 21,384 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 21384 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21384

• 21384 backwards is 48312
• 21384 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 21384's digits is 18
• More coming soon!