Which of the following numbers is the largest prime number listed here?

The largest prime number listed among the options is 23. A prime number is defined as a natural number greater than 1 that has no positive divisors other than 1 and itself.

When analyzing the provided numbers, 17, 19, and 13 are all prime, but they are all smaller than 23. The number 23 only has two divisors, which are 1 and 23 itself, confirming its status as a prime number. Thus, among the given choices, 23 stands out as the largest prime number.