William,
Your question, “Can Satan here my prayers? is a good one. Satan is misunderstood by most people. People do not understand his power or his limitations. In fact most people just want to forget he exists.
Your question, as I understand it is, does Satan have Omni powers?
To get the answer we need to look at angels in the Bible. Satan is an angel even though he is fallen.
God is omnipresent (everywhere present), omniscient (to have all knowledge) and omnipotent (all powerful). Satan is none of these. No angel has these attributes, including Satan.
Satan is not omnipresent. He must move from one place to another and as all Angels must (Daniel 9:21-23). Like the angle Gabriel who has to come to Daniel to give him a message Satan must move physically from place to place. Job 1:7: “The Lord said to Satan, “Where have you come from?” Satan answered the Lord, “From roaming through the earth and going back and forth in it.”
Satan is not omniscient. Nothing in the Bible gives this power to anyone but God. We find no examples of omniscience where Satan or any angel is concerned. We do find examples in scripture that show angels do not possess omniscient powers. In Exodus twelve, the Destroying Angel had to have a sign by which to know Hebrew houses from Egyptian houses (Blood on the door post). Further evidence of angels’ lack of omniscience is the statement made by Jesus in Matthew 24:36 that the angels of heaven know not the day nor the hour of our Lord’s return. And Peter, speaking by inspiration in I Peter 1:11, 12, says that the angels, though they desired to, were unable to look into the Gospel plan of salvation through Jesus Christ.
Angels and therefore Satan are not omnipotent. In Job, God limits Satan’s ability to test Job. Another example showing Satan and his demons are in Gods control exists in Mark 5 where Jesus drives out demons.
As for listening to your prayers the devil or one of his demons could hear your prayers. As we have seen in the study above the devil cannot be every place at the same time so he cannot hear everyone’s prayers at the same time. We do know that the devil has many demons who want to destroy and deceive all those who follow and worship God (1 Peter 5:8;2 Corinthians 11:14-15). The demons are described as evil spirits (Matthew 10:1), unclean spirits (Mark 1:27), and angels of Satan (Revelation 12:9). Satan and his demons deceive the world (2 Corinthians 4:4), attack Christians (2 Corinthians 12:7;1 Peter 5:8), and combat the holy angels (Revelation 12:4-9).
So a demon might well hear your prayers. This should not deter you from praying. Remember God is stronger than the evil spirits that follow the evil one. Your prayers are protection from the evil one not a liability. The following verses give us confidence in God’s protection:
John 10:28-29 ~ “And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of My hand. My Father, which gave them to Me, is greater then all; and no man is able to pluck them out of My Father’s hand.”
Philippians 1:6 ~ “Being confident of this very thing, that He which has begun a good work in you will perform it until the day of Jesus Christ.”
2Thessalonians 3:3 ~ “But the Lord is faithful, who shall establish you, and keep you from evil.”
Hebrew 13:5b-6 ~ “For He has said, “I will never leave you, nor forsake you.” So that we may boldly say, “The Lord is my Helper,” and I will not fear what man shall do to me.”
For more information on angels and demons see: “The Serpent of Paradise” by Erwin W. Lutzer or Angels Elect & Evil” by C. Fred Dickason.