What prime number comes next after 19?

The next prime number after 19 is 23. A prime number is a positive integer greater than 1 that has no positive divisors other than 1 and itself. After 19, the next numbers in the sequence are 20, 21, 22, and 23. Among these, only 23 satisfies the definition of a prime number as it has no divisors other than 1 and itself. Hence, 23 is the next prime number in the sequence after 19.