Is God All Powerful? Is God Omnipotent?

Genesis 18:14 Is any thing too hard for the LORD? At the time appointed I will return unto thee, according to the time of life, and Sarah shall have a son.

Luke 18:27  And he said, The things which are impossible with men are possible with God.

Revelation 19:6  And I heard as it were the voice of a great multitude, and as the voice of many waters, and as the voice of mighty thunderings, saying, Alleluia: for the Lord God omnipotent reigneth.