The prime numbers (factors) of 18 are: 2 and 3
There are two pairs of prime numbers that express 18 as the sum of two prime numbers: 7 + 11 = 18 and 5 + 13 = 18.
5 and 41 are prime numbers but 18 is a composite number
The sum of the prime numbers 2, 5, and 11 is 18.
Prime factors of 18 are 2 and 3.
18 is not a prime number so no number can have 18 as a prime factor.
All odd numbers that can not be divided by 3 evenly would be relatively prime with 18.
You can multiply the number 18 by different numbers that are relatively prime, for example by different prime numbers.
No, neither 12 nor 18 are prime numbers. A prime number is a number greater than 1 that can only be divided by 1 and itself. Both 12 and 18 can be divided by numbers other than 1 and themselves, so they are not prime.
no.
2, 3, and 13 are all prime numbers and their sum is equal to 18.
The numbers 19 and 23 are prime.