19 is Prime number.
10, 21 and 62 are composite numbers.
No, the numbers 19, 21, and 23 are not composite numbers. A composite number is a positive integer greater than 1 that has more than two distinct positive divisors. In the case of these numbers, 19 and 23 are prime numbers because they are only divisible by 1 and themselves, while 21 is a composite number because it has divisors other than 1 and itself (3 and 7).
19. It is prime.
19 is a prime number. Its only factors are 1 and 19. 21 is a composite number. Its factors are 1, 3, 7, and 21. 23 is a prime number. Its only factors are 1 and 23.
Prime numbers: 11, 13, 17, 19, 23, 29 Composite numbers: 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30
21 is composite. 19 and 23 are prime.
4, 21
21 is composite.
All the numbers are composite except the ones in bold: 18 19 20 21 22 23 24 25.
3, 7, and 19 have only two factors, 1 and itself. They are prime numbers. 21 has more than 2 factors: 1, 3, 7, and 21. It is a composite number.
The prime numbers between 10 and 21 are 11, 13, 17, and 19.
They are all prime numbers except for 15 21 25 and 27 which are composite numbers
21 and 32