21 has two prime factors.
No, 21 and 23 are not twin prime numbers. Twin primes are pairs of prime numbers that differ by 2, such as 3 and 5, or 11 and 13.
The prime numbers between 10 and 21 are 11, 13, 17, and 19.
factors of 21: 3, 7 prime factors of 21: 3, 7
There are 21 two-digit prime numbers.
Do you mean, "What is the prime factorization of 21?"
21 is not prime.
21
there are 3 prime numbers in between 21 and 33... they are 23,29, 31.
21 has two prime factors.
The prime numbers from 21 to 40 are 23, 29, 31, and 37.
7 and 3 are prime numbers but 21 is a composite nuber
There are 3 prime numbers from 21 to 35:23, 29 and 31
The prime factors of 21 are 3 x 7.
17 is a prime number, but 21 is not (21 = 3 * 7).
21 is not a prime.
11 is a prime number but 21 is not a prime number as it is divisible by 3.