can I get Amritapuri campus cse for the rank 17k?

Congratulations for your result. You know the cutoffs depend on various factors so it keeps changing every year. You haven't mentioned which State you belong to, as the cutoffs also depend on that. Considering you as a general category student, it will be difficult to get Amrithapuri Campus of Amrita Vishwa Vidyapeetham if you don't belong to the state quota. For state quota candidates, the closing rank lies around 16000 while for other state students it's around 6900 to 7000. So if you have state quota, you have few chances that you may get CSE in Amrithapuri campus. If not Computer Science, you can expect Electronics And Communications, Electrical and Electronics, Mechanical Engineering branch. Now this is based on previous years' cutoffs and this year it might change. You can check the list of all campuses and all branches http://engineering.careers360.com/articles/aeee-cutoff