The winning numbers were 23, 36, 12, 31, 13, and the mega number of 10.
The ticket was sold on Nov. 14, 2020 at an ARCO AM/PM located at 10602 E. Imperial Highway.
According to California Lottery officials, SuperLotto Plus jackpots must be claimed no later than 180 days from the winning draw date.
That means Thursday is the last day to claim the prize. Lottery officials are asking players to check their tickets.
If the ticket expires, the prize cash value of $19.7 million will be transferred to California public schools.
The business that sold the ticket earned a bonus of $130,000.
For details on how players can claim prizes, visit the California State Lottery's website.