If God is omnipotent you will run in several paradoxes 
Same about perfection and similar questions.
So God is omnipotent by definition.If you try to deny this, others will build huge wall of text 
It all depends on what you mean by the string of characters "o-m-n-i-p-o-t-e-n-t".
Ex:
His Omnipotence means power to do all that is intrinsically possible, not to do the intrinsically impossible. You may attribute miracles to him, but not nonsense. This is no limit to his power. If you choose to say 'God can give a creature free will and at the same time withhold free will from it,' you have not succeeded in saying anything about God: meaningless combinations of words do not suddenly acquire meaning simply because we prefix to them the two other words 'God can.'... It is no more possible for God than for the weakest of his creatures to carry out both of two mutually exclusive alternatives; not because his power meets an obstacle, but because nonsense remains nonsense even when we talk it about God.
– Lewis, 18
This is the type of omnipotence typically attributed to deities by believers.
Alternatively there is the type of omnipotence that permits logical contradictions for a deity. This definition is typically used by non believers.
I was very interested in what Lewis had to say about omnipotence in
The Problem of Pain when I read it years ago. To my surprise, I could not find a flaw in his argument. I admit that it's possible that this is the best possible world -- that evil exists only because a world with less evil would somehow contradict itself or be worse in other ways. It certainly seems obvious that you could improve this world quite dramatically with infinite power, but of course, the subtle contradictions could be escaping us. Yes, it's true: everything, even the most horribly bad thing, could all be a part of God's great plan, which is of course beyond human comprehension.
But I wouldn't bet on it. Just because something's possible doesn't mean it's likely
If God is omnipotent, and he wants me to believe in him, then he will simply use his omnipotence to make me believe in him. I don't believe in him right now, so there are two possibilities. One, he wants me to believe in him, but he is not omnipotent so he cannot make me believe in him. Two, he is omnipotent, but he does not make me believe in him because he does not want me to. So why should I believe in God if he is not omnipotent or if he doesn't want me to?
Don't tell me that God is simply trying to make me believe in him through his followers. If you try to convert me, I guarantee that you have less than one percent chance of success. If God really wants to convert me, and is omnipotent, he would have surely used a more reliable method.
Maybe it's all part of a magical storybook adventure God is making of your life. Perhaps you're just not supposed to believe
yet. What may seem unreliable is a sure thing for someone who skips to the last page. There is no God, you die, and that's it.
I agree, though. I think if he wanted us to believe in something, he'd give us some kind of evidence.
