Hello Dear,

You do not mention the exam in which you got 18579 rank. But if you are talking about WBJEE.

It is very difficult to predict the college because you do not mention your state region(home state or other state). As you know, all the seats of WBJEE are allotted on the basis of GMR rank and your general merit rank is 18579. You are belonging to OBC category. So you have OBC category quota. There is chance to get admission in some colleges that are accepting WBJEE scores such as

Maulana Abul Kalam Azad University of Technology

University of Kalyani, Kalyani

Haldia Institute of Technology, Haldia

Narula Institute of Technology, Agarpara, etc.

You can also predict college from the link given below :-

To more information about  WBJEE Cutoff :-

WBJEE Cutoff 2021 (Soon) - Check Previous Year Cutoff, 2020, 2019, 2018, 2017, 2016 (careers360.com)

Hope this information helps you...

Best of luck :)