there r 33 crores demigods(not gods)..but supreme is krishna..krishna has three types of vishnu expansions-one resides in r heart as paramatma,another expansion(gurbhodahkshi vishnu) creates unlimited universes&&other expansionsie third vishnu has reincarnations-like ram...its given in scriptures&&vedas..for more information...please come in contact wid any nearby iskcon temple....
