Yes, the Indonesia e-Visa has a unique visa number. This number is normally found on the official e-Visa document and is used to track and verify your visa status in the Indonesian immigration system. The visa number is connected to your passport and is required for immigration inspections when you enter and stay in Indonesia.
When you get your e-visa, it normally includes the following information:
Keep a copy of your e-visa with you when you travel, since the visa number is required by immigration officials to authenticate your admission into the nation.