I believe you have somewhat moderate chances of securing CSE, CSE Spez or IT  in VIT Chennai by Category 2 of Counselling with a Rank of 20700 in VITEEE. However, at this Rank, you may even secure Electrical or ECE by Category 2 at VIT Vellore which too are good options. I would advise you to not go past Round 3 of Counselling as their is a significant fifference in Tuition.

For more information and VIT Cutoff do follow the link below

https://engineering.careers360.com/articles/viteee-cutoff/amp