Manchester City have already handed Bernardo Silva his shirt number
Silva will wear the number 20 shirt at Manchester City – effectively confirming Eliaquim Mangala's departure.
City will try to secure a permanent move for their £42m defender, who spent last season on loan at Valencia.
Pep Guardiola's decision to hand Silva his shirt is further confirmation the 26-year-old does not have a future at the club.
Silva became City's first signing in a summer when Guardiola plans to bring in six major additions.