# 18993

## 18,993 is an odd composite number composed of three prime numbers multiplied together.

What does the number 18993 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

18993 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 18993:

### 3 × 13 × 487

See below for interesting mathematical facts about the number 18993 from the Numbermatics database.

### Names of 18993

• Cardinal: 18993 can be written as Eighteen thousand, nine hundred ninety-three.

### Scientific notation

• Scientific notation: 1.8993 × 104

### Factors of 18993

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 503

### Divisors of 18993

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 27328
• Sum of proper divisors (its aliquot sum) s(n): 8335
• 18993 is a deficient number, because the sum of its proper divisors (8335) is less than itself. Its deficiency is 10658

### Bases of 18993

• Binary: 1001010001100012
• Base-36: ENL

### Squares and roots of 18993

• 18993 squared (189932) is 360734049
• 18993 cubed (189933) is 6851421792657
• The square root of 18993 is 137.8150935131
• The cube root of 18993 is 26.6807391003

### Scales and comparisons

How big is 18993?
• 18,993 seconds is equal to 5 hours, 16 minutes, 33 seconds.
• To count from 1 to 18,993 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 18993 cubic inches would be around 2.2 feet tall.

### Recreational maths with 18993

• 18993 backwards is 39981
• The number of decimal digits it has is: 5
• The sum of 18993's digits is 30
• More coming soon!