Just how much of that would be transferred to other objects (ejecta, fracturing and or plate movement), or converted to heat (melting, evaporation) would depend on the impact site and angle.
A bit off in your speed conversion, should be around 11,000 m/s.
As it is, the energy contained in that rock would cost about $250 Million if purchased as electricity - it’s about the output of one large nuke reactor operating for a year...and likely equals all of the world’s power production for an hour.
But it is released at one point in virtually one instant. It will be noticed.