# 18491

## 18,491 is an odd composite number composed of two prime numbers multiplied together.

What does the number 18491 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

18491 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

## Prime factorization of 18491:

### 11 × 412

(11 × 41 × 41)

See below for interesting mathematical facts about the number 18491 from the Numbermatics database.

### Names of 18491

• Cardinal: 18491 can be written as Eighteen thousand, four hundred ninety-one.

### Scientific notation

• Scientific notation: 1.8491 × 104

### Factors of 18491

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 52

### Divisors of 18491

• Number of divisors d(n): 6
• Complete list of divisors:
• Sum of all divisors σ(n): 20676
• Sum of proper divisors (its aliquot sum) s(n): 2185
• 18491 is a deficient number, because the sum of its proper divisors (2185) is less than itself. Its deficiency is 16306

### Bases of 18491

• Binary: 1001000001110112
• Base-36: E9N

### Squares and roots of 18491

• 18491 squared (184912) is 341917081
• 18491 cubed (184913) is 6322388744771
• The square root of 18491 is 135.9816164045
• The cube root of 18491 is 26.4435728253

### Scales and comparisons

How big is 18491?
• 18,491 seconds is equal to 5 hours, 8 minutes, 11 seconds.
• To count from 1 to 18,491 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 18491 cubic inches would be around 2.2 feet tall.

### Recreational maths with 18491

• 18491 backwards is 19481
• The number of decimal digits it has is: 5
• The sum of 18491's digits is 23
• More coming soon!