Hello Jagan,

You secured 81.67 percentile and with this percentile your rank is  in between 150000 to 2,00,000 and you have not good chance of getting admission in top 20 Nits with this predicted rank.

You can try for lower NITs like mit Agartala,nit Hamirpur,nit Silchar,nit SRINAGAR,nit nagaland.

I recommend you to use career360 college predictor tool which gives you best suitable Colleges with branches according to your rank.link for this tool is https://engineering.careers360.com/jee-main-college-predictor .hope this helps you.

Good luck for jee advance.