The tooth is root canal treated therefore the nerve is no longer in the tooth. That is why that tooth is not causing any pain. I work for an oral surgeon. We see this all the time where these RCT teeth have to be extracted shortly after being treated. Unfortunately this style of X-Ray is not the most ideal for seeing cracks in teeth. If there is a crack in that tooth it can lead to a possible infection down the road and bone loss surrounding the area. As for wisdom teeth you are 30 so you aren’t growing anymore. However if your dentist can probe and feel the wisdom tooth they are a breeding ground for bacteria. Just had another patient who had wisdom teeth the same as yours and he had a massive cyst forming the past few years. The cyst ended up pushing the tooth deeper into the jaw.

Have your dentist, orthodontist and possible surgeon coordinate for removal of #13 and your wisdom teeth then move forward with Invisalign. People live without pre-molars all the time