It's difficult for anyone here to see what you are seeing.
I'd say it's normal. What you see might be processes and threads. 12c has better support for threads to take advantage of multiple CPU's. Keep in mind that a single process cannot not run on multiple processors at a time, hence processes in 12c spawn threads for multiple tasks, and each thread can run on a different CPU.
It depends on your configuration. But I have a testbed, 2-node RAC primary that uses Data Guard and the DG Broker with a 2-node RAC standby db. This db is version 19.3 and with no additional config other than what was needed for the standby. One of my primary nodes has 85 processes running with no connected sessions and no monitoring like EM.