Watt output of radio station
There is no simple answer.  Working from ((old)) memory, transmitter output power ranges from 5 kW to over 50 kW.  Then the antenna has a shaped radiation pattern (after all, why waste power radiating upward?); it is not a simple point source radiator that so many formulae are based on.  Then you get into multi-antenna phased arrays for serious directionality.
Most radio stations have a website and a Wikipedia page.  Between the two you should be able to find out the basics for stations near you: transmitter power and ERP - effective radiated power.