rsa public and private keys
The key you wrote down contains a mixed alphabetic and digit symbols because it is written in its hexadecimal representation: i.e. using symbols from 0 to 9 and from A to F. More on this topic on Wikipedia page. 
You can easily convert hexadecimal to decimal using software as python, sage, Pari/GP and many others. 
An online converter could be found here: Hexadecimal to Decimal Converter

About the key generation, the process is the same you described but with bigger numbers: a standard RSA key uses primes of about 1024 bits. The real different part is find a prime number of such size: there are some algorithms that outputs a number of wished size and (with high probability) prime.