0
2 x 9 = 18, so 18 has more factors than 1 and itself. It cannot be prime because a Prime number has two factors: 1 and itself.
Still curious? Ask our experts.
Chat with our AI personalities
JordanLooking for a career mentor? I've seen my fair share of shake-ups.
Chat with Jordan
ReneChange my mind. I dare you.
Chat with Rene
BlakeAs your older brother, I've been where you are—maybe not exactly, but close enough.
Chat with BlakeAdd your answer:
Earn +20 ptsQ: Why is 18 not a prime number?
Write your answer...
Submit
Still have questions?
Continue Learning about Math & Arithmetic
What two composite numbers have the prime who's prime factors are 18?
18 is not a prime number so no number can have 18 as a prime factor.
Are 2 and 18 composite or prime?
2 is a prime number. 18 is a composite number.
A prime number sentence for the number 18 A PRIME NUMBER SENTENCE FOR 18?
2 x 3 x 3 = 18
What are the prime factorization for number 18?
The prime factorization of the number 18 is 2 x 3 x 3.
What numbers are 18 relatively prime to?
Any odd prime number.
Trending Questions
Is 1035 divisible by 2?
In the name of the father spirit and holy ghost?
What numbers are 232 divisible by?
What is the midpoint between 12 and 56?
How many faces does a irregular polyhedron have?
What is the fraction of 380 percent?
What number is multiplied to make 117?
How do you write 36000 in scientific notation?
What percent is 578 out of 660?
what is multiplicative inverse of 0.7?
What are the rules for regular polygons?
What is the ratio of male to female in Europe?
How many illgal imagrants come acrosst the border in 1 year?
Is swift code same as sort code in banking?
Are altitudes and medians congruent in the same isosceles triangle?
What is 16 devide 3?
Is it 8 divided by 100 or 100 divided by 8?
What day of the week was Sept 21 1961?
What is the area of Vic-sur-Aisne?
what is zero.four times 7?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.