A unique, alphanumeric identification of a supplier.

The supplier number is usually stored in the supplier master data and can be used to quickly obtain information about the supplier. This includes contact details, terms of delivery and terms of payment. The supplier number is also important for carrying out operations in the Purchasing and managing supplier relationships. In SAP Business One you can enter the supplier number in the "Master data" tab of the supplier form.
Meaning of the supplier number
The supplier number, also known as the vendor number, is a unique identifier for a contractual partner or supplier in an authority's budget settlement system (HV system)