Which mountain on earth is closest to space?

Due to peculiar shape of earth Mount Chimborazo which is located in Ecuador stands as the closest mountain to space. Though Mount Everest is the highest mountain in the world it is not closest to space because due to bulge shape of earth around Equator Chimborazo is closest to space. Everest is highest when it is measures from sea level but when measures from the center of the earth Chimborazo stands as highest.