I think 20 applications will be tough to manage. Essays, interviews, visits, more essays, homework, senioritis, etc. Twelve to Fifteen would be better. JMHO.
I only see NC State as your true safety. Probably South Carolina too. PSU, Illinois and Wisconsin aren’t safeties because you’re OOS and business is typically a high demand major. Smeal is changing their admission process this year too.
You need to decide if Econ is really an acceptable alternative to Finance. They really are different. My concern with schools like UVA, UNC and Wake are secondary admissions. What if you grow to love Finance and hate Econ but get shutout of their b-schools? You’re stuck or you’ll have to transfer. Why put yourself in that position?
Indiana Kelley has 10k undergrad students alone. Is that appealing? It’s easy to feel like a number at a large public school. Apply to Honors programs. They can help at large schools and offer useful perks.
If you’re looking for a few targets I would add Fordham and SMU. Well regarded b-schools and you would be competitive for scholarships and honors opportunities.
With your high math score you might want to look at something more quantitative.