How many such numbers are there in the arrangement h93pkeOr1uwg2mi5bqz6 each of which is immediately preceded by a letter and immediately followed by symbol?

None, since there are no symbols and so nothing which can be "immediately followed by symbol".

None, since there are no symbols and so nothing which can be "immediately followed by symbol".

None, since there are no symbols and so nothing which can be "immediately followed by symbol".

None, since there are no symbols and so nothing which can be "immediately followed by symbol".