# 18121824

## 18,121,824 is an even composite number composed of five prime numbers multiplied together.

What does the number 18121824 look like?

This visualization shows the relationship between its 5 prime factors (large circles) and 144 divisors.

18121824 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.

## Prime factorization of 18121824:

### 25 × 32 × 7 × 89 × 101

(2 × 2 × 2 × 2 × 2 × 3 × 3 × 7 × 89 × 101)

See below for interesting mathematical facts about the number 18121824 from the Numbermatics database.

### Names of 18121824

• Cardinal: 18121824 can be written as Eighteen million, one hundred twenty-one thousand, eight hundred twenty-four.

### Scientific notation

• Scientific notation: 1.8121824 × 107

### Factors of 18121824

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 202

### Divisors of 18121824

• Number of divisors d(n): 144
• Complete list of divisors:
• Sum of all divisors σ(n): 60147360
• Sum of proper divisors (its aliquot sum) s(n): 42025536
• 18121824 is an abundant number, because the sum of its proper divisors (42025536) is greater than itself. Its abundance is 23903712

### Bases of 18121824

• Binary: 10001010010000100011000002
• Base-36: ASEW0

### Squares and roots of 18121824

• 18121824 squared (181218242) is 328400505086976
• 18121824 cubed (181218243) is 5951216154697283764224
• The square root of 18121824 is 4256.9735728567
• The cube root of 18121824 is 262.6640498363

### Scales and comparisons

How big is 18121824?
• 18,121,824 seconds is equal to 29 weeks, 6 days, 17 hours, 50 minutes, 24 seconds.
• To count from 1 to 18,121,824 would take you about forty-four weeks!

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 18121824 cubic inches would be around 21.9 feet tall.

### Recreational maths with 18121824

• 18121824 backwards is 42812181
• The number of decimal digits it has is: 8
• The sum of 18121824's digits is 27
• More coming soon!