Numbers and vowels have colors for me. 1 white-ish, 2 red, 3 yellow, 4 green, 5 brown, 6 dark red, 7 blue, 8 gold-white, 9 dark green, 0 black, A green, E orange, I white, O black, U brown, Y turquoise. Some consonants “feel” like they have color, but far less pronounced.
Also sounds have colors and shapes but that may just be association.
Edit: does synesthesia qualify as neurodivergence? Am I neurodivergent? What does this mean??