twisted prime

#include<stdio.h>
#include<conio.h>
void main()
{
int n,r,s=0,i,prime=0;
printf("Enter a number: ");
scanf("%d",&n);
while(n>0)
{
r=n%10;
s=s*10+r;
n=n/10;
}
printf("The reverse of the number is: ");
for(i=0;i<s/2;i++)
{
if(s%i==0)
{
prime=1;
break;
}
}
if(prime==0)
printf("Its a twisted prime number.");
else
printf("Its not a twisted prime number.");
getch();
}