To sum up what everyone said, you are only looking in the viewport. The viewport has the 32 samples, but the render has 20000.
To see the render, hit the render button, but be warned that 20000 is a TON of samples (if you need that many samples, you're doing something wrong). A few hundred will do just fine.
As I see in the picture, you are using the render viewport and not actually rendering it with a camera. using the viewport and using the camera is totally different.
If you want to render with your camera you will want to press print ( or F12 ) on your keyboard.
The viewport render is only for a quick glance of what it will look like fully rendered with a ton of render samples ( your 20000) placed into your camera.
The viewport render which you are rendering in now will not produce a picture for you to save. The camera will.
The camera will render like you taking a picture in real life, but you must have samples for it to render without grain.