Hello Aspirant,

You have mentioned that your rank is 18786 so, the expected previous year cutoff for the candidate to get admission in SRM (main branch) in desired course was 9500-10500.

It's difficult for you to get admission in main campus with this rank as the cut off trend is very high. There are chances that you will get mechanical engineering,  chemical engineering,  civil engineering,  aerospace engineering but that too depends on the cutoff which goes really high ( depends on luck).

For further information you can check the following link:

https://engineering.careers360.com/articles/srmjeee-cutoff

All the best!