What number is kaka in Brazil?

The famous soccer player Ricardo Izecson dos Santos Leite, known by the nickname 'Kaka', started playing football when he was only eight years old, and he signed his first professional contract with the club Sao Paulo FC at the age of 15, so, If he is 32 years old, he has been playing soccer for 24 years, and at professional level for 17 years.