I think its over 50 or more hotels.
No. A prime number is a number that can only be divided by itself and 1. The first prime number is 2 - which is also the only even prime number. The prime numbers from 1 - 20 are: 2 and 3 and 5 and 7...
Since there are infinitely many numbers, there can be no answer.
All numbers are not natural numbers. Natural numbers are 1,2,3,4,5....
Yes. Any integer can be transformed into a decimal number by adding a decimal point and then a zero after, for example: 3 = 3.0
It is impossible to list all the prime numbers - there are infinitely many.