Which numbers are prime numbers? Number which is divisible only by itself and 1. Here are the first few prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41..etc. Following can be code in C++ to decide number is prime or not. 1 include 3 using namespace std 6 int main () int numberi bool IsPrimenumbetrue cout cin > numberi 10 12 13 14 15 16 17 18 19 20 21 Dec ding printPrime-Numbers; for (int divi0r-2; divisor