# 20818

## 20,818 is an even composite number composed of three prime numbers multiplied together.

What does the number 20818 look like?

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

20818 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 20818:

### 2 × 7 × 1487

See below for interesting mathematical facts about the number 20818 from the Numbermatics database.

### Names of 20818

• Cardinal: 20818 can be written as Twenty thousand, eight hundred eighteen.

### Scientific notation

• Scientific notation: 2.0818 × 104

### Factors of 20818

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1496

### Divisors of 20818

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 35712
• Sum of proper divisors (its aliquot sum) s(n): 14894
• 20818 is a deficient number, because the sum of its proper divisors (14894) is less than itself. Its deficiency is 5924

### Bases of 20818

• Binary: 1010001010100102
• Base-36: G2A

### Squares and roots of 20818

• 20818 squared (208182) is 433389124
• 20818 cubed (208183) is 9022294783432
• The square root of 20818 is 144.2844412957
• The cube root of 20818 is 27.5093081439

### Scales and comparisons

How big is 20818?
• 20,818 seconds is equal to 5 hours, 46 minutes, 58 seconds.
• To count from 1 to 20,818 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 20818 cubic inches would be around 2.3 feet tall.

### Recreational maths with 20818

• 20818 backwards is 81802
• The number of decimal digits it has is: 5
• The sum of 20818's digits is 19
• More coming soon!