How to Convert UnicodeEncode value to Integer in VB.NET

From that? Probably not.
The first thing you need to do is examine that data in it's rawest form - as bytes rather than as a string.
It would probably help you if you had several values for comparison - it is far to easy to make mistakes when working back from a single example.
 
Look at the raw data - I'm not even going to start by looking at the data in your post as it has almost certainly be reworked and interpreted by several systems before it gets to me, and you need to look at the original, uncorrupted version.
 
Then, start looking for correlations - it is possible that it is just a bit-packed cut-down alphabet with 36 characters (A-Z, 0-9), or less to fit it into 5 bits. Without the raw data and a couple of examples, all we (and you) could do is guess.
 
It would be the most help if you used the specification for the conversion as it is always possible to make mistakes when you work something out.
 
What is this from?