There are an infinite amount of answers to that, but 1.85 is the number that is halfway between them.
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The number 19 it is between 18 and 20 and is a Prime Number.
The single number directly between those two numbers is 18.
18 is a natural number following 17 and preecending 19 18 is a natural number following 17 and preecending 19 18 is a natural number following 17 and preecending 19 you become an adult
19-18 leaves 1 second.
18 falls between 17 and 19.
The number 19 it is between 18 and 20 and is a Prime Number.
The single number directly between those two numbers is 18.
18 is a natural number following 17 and preecending 19 18 is a natural number following 17 and preecending 19 18 is a natural number following 17 and preecending 19 you become an adult
The first prime number after 18 is 19.
19-18 leaves 1 second.
18 falls between 17 and 19.
The number midway between 19 and 53 is 36.
19 is prime.
18.
4.01234567891011121314... keep appending the next counting number on the end {15, 16, 17, 18, 19, 20, ...} and you will have an irrational number between 4 and 5.
19 YES, 19 is prime because 2,3,4,5,6,7,8,9,do not go in to 19. I stop at nine because 18 is one under 19 and 9 x 2=18. The only factors of 19 are 1 and itself, making it a prime number.
The number halfway between 18 and 60 is (18 + 60)/2 = 39.