There are 21 two-digit prime numbers.
8, 11, and 20.
There are 17 such numbers.
2, 3, 5, and 7 are the only one-digit prime numbers.
73 is the largest two-digit number that is prime and has prime numbers for both of its digits.
There are 21 two-digit prime numbers.
There are 21 two-digit prime numbers. The first two-digit prime number is 11, and the last two-digit prime number is 97. Prime numbers are numbers greater than 1 that are only divisible by 1 and themselves.
8, 11, and 20.
There are 17 such numbers.
The answer depends on what you mean by "like 19". Possible labels: Counting numbers, Integers, Rationals numbers, Real numbers, Prime numbers, Odd numbers, Teens, 2-digit numbers.
2, 3, 5, and 7 are the only one-digit prime numbers.
There is no pattern.
73 is the largest two-digit number that is prime and has prime numbers for both of its digits.
17, 37, 47, 67, 97
997 is the largest 3-digit prime number.
73 is the largest 2 digit number that is both prime and has prime numbers for both of its digits.
There are infinite prime numbers as there is infinite numbers. You cannot limit the counting of primes.