It's a bit complicated and it depends on what exactly you're measuring. The 68000 CPU has 32-bit registers internally, the address bus is 24-bit, and the data bus is 16.
This is so for A500, but the definitive Amiga is A1200 with 68EC020, AGA and only limited by 24 bit address bus (=16 MB ram). From that on people just installed 030 with MMU and later PPCs if they wanted.
This is so for A500, but the definitive Amiga is A1200 with 68EC020, AGA and only limited by 24 bit address bus (=16 MB ram). From that on people just installed 030 with MMU and later PPCs if they wanted.