batch number

How to remove blank spaces in front of the batch number (LOTN) without losing the traceability batch between the tables? Exist anything tools for this?

My company is currently at 98,260,000 on our batch next number. We will use the remaining 1,700,000 number in the next 3 to 4 months. We have a concern about the rollback to 1 of this number and what will happen to performance on inserts as well as duplicate numbers to what we have archived...