Question: 20 megapixels is how many pixels?
Answer: A 1-megapixel camera takes photos with a million pixels in them; a 20-megapixel camera captures 20 million pixel photos. Think of it like a grid that tells you how wide and tall the photo is. Consider the Nikon D7000, a 16-megapixel camera. It takes photos that are 4928 by 3264 pixels.