by the raw, gods of divinity under 20 benefit from worshipers (even 0 divinity ones; which is different than a non god who has NO divinity score at all).
But a mortal will not become a god via being worshiped. Anyways the rules say that noone can become a god without the explicitly approval of a divinity 20+ god (divinity 20+ gods have no worshipers, and need none, they are beyond the concerns of this world)