Or am I thinking backwards? Does that mean that 20,000 kcal is the same as 2000 Calories a day? That would be a nice healthy diet, but still about 2 times the Moochelle recommendation for growing youths.
2,000 Calories = 2,000 kcal = 2,000,000 calories.
20,000 Calories is about 10x what a modern sedentary largish adult consumes daily. If you’re working your butt off every day dawn to dusk, instead of mostly just sitting on it, I’d not be surprised if that were an attainable intake.
...which makes me also consider: ‘tis observed that the hearts of warm-blooded critters (us included) have a MTBF (i.e.: functional lifespan) of about 1 trillion beats. If you’re working hard enough to burn something in the vicinity of 20,000 kcal/day, you’re working hard enough to double your average heart rate - which means halving your lifespan. Indeed, living to 50 was considered _old_, with 30-40 being typical.
20,000 Kcal is 20,000 Calories. The kind you see on packages.