Would you say that God IS the entire universe?
For instance, if God is the entire universe then we are all smaller parts of God and the Earth itself is a smaller part of God. God is omnipresent because God is literally everywhere. God is omniscient because God is literally every mind, thinking and knowing all things that can be known, all simultaneously. God is omnipotent since God is the total sum of all energy in the universe and thus all powerful.