The value of kp at 20°c for the reaction 2NO(g) + Cl2(g) 2NOCl(g) is 1.9x10^3 atm-1 calculate the value of KC at the same temperature

Kp = Kc*(RT)^delta n

1900 = Kc*(0.08205*293)^-1
Solve for Kc.