One hundred ninety-three or 195 or 200, give or take, and depending on who you ask:
Via CGPGrey.
This scaled-down version doesn’t quite do it justice, but here is a shot from NASA of the planet at night (Nov. 27, 2000), showing both densely populated and developed regions versus less urban parts of Africa, South America, Asia and elsewhere:
Here are links to the full-sized picture and more information.