How does one Satan be everywhere at once in Islam?

He creates other Satans to possess.

The leader of all Satan is known as Iblees, there are others like Dasim who are responsible for Bringing hatred towards men and women, awar, zalambur, tir, Sut, etc etc

Satan does not obey the barriers of space and time. Just like an Angel [use to be an Angel, the Satan]. Satan turned on God as he felt he God cared more about people than the Angels. God condemned him, so he said, now I will spend all my time tricking people into becoming disbelievers, so that they follow me and burn in hell with me. 

In any event, because Satan is not restricted by time and space it can influence many people at the same time. However, more importantly, God is there too and watches over us.   

You mix everything up, because Islam curses Satan and his acolytes: the disbelievers and the hypocrites.

Allah within Islam is satan the Antichrist

How many suns in the sky that shine its light and heat all over the sky and earth.

cause thats what satan does

cause hes everywhere too

When Muslims play ice hockey they don't play by positions they all play the puck and Miroslav was the best ever at that when he played for the Riyadh Rovers.