It is the average energy consumption. the question is, what trip(s) does it apply to? Where do you see that number? If it is in the Trips app, that should indicate the distance and tell you if it is the average for your last start, or since your last charge. If it is from the Energy app, it reflects the average over some distance you selected -- instant (1 mile), 5 miles, 15 miles, or 30 miles.
That is an extremely high value, roughly 4 times the EPA rating, so it is most likely from a very short trip. or it may reflect extra energy consumed while preheating the car and without being plugged in, something like that.
Please tell us where you read the figure, and what else the screen says, as well as what you were doing.
So, you need to tell us more.