Andre Gomes also joined Everton in a loan deal from Barcelona and Silva felt a temporary deal for his compatriot was too good to resist.
Everton submitted a deal sheet ahead of Thursday's 5pm deadline meaning Everton had today to conclude formalities.More news: The Big Match Tactical View: Arsenal v Manchester City
"Frenchman Zouma moves from Chelsea and joins Brazil midfielder Bernard, Barcelona trio Yerry Mina, Andre Gomes and Lucas Digne, Richarlison and Joao Virginia in arriving at Goodison in the summer transfer window".
Ousmane Dembele has brushed off speculation linking him with a move this summer, saying, "I'm staying at Barcelona" during a live broadcast with French online streamer FM_Guru.More news: Sarri off the mark as Chelsea ease past Mooy's Huddersfield
The 23-year-old spent the previous campaign out on loan with Stoke City and featured regularly in their starting line-up.
'It is important that the club want to fight for something, ' Mina told evertontv.
"I know about Everton's players and I look forward to being able to play with my new team".More news: Juventus-Marcelo contact talk sparks concern — Real Madrid
To date, he's featured in no fewer than 71 outings for the Blues, collecting two Premier League winners medal in the process, whilst registering four goals.