I am assuming that you are talking abut andhra pradesh as your home state and your sc rank is 17866 so this is quite simple that you will not get any seat in nitap which ever branch you may tall about as the closing rank is about 9000 in sc  category basis and you have a very high rank in that prospective so you may not get any seat here but yes you can predict other colleges using this link

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer