It all depends on the motherboard, but I doubt you'd even find a 32-bit consumer CPU for sale at Dell at this point. Your CPU is not a 32-bit CPU, it's a 64-bit one.
There's no real practical application for this question. For example, the last CPU released by Intel that was 32-bit *and* is socketed in a manner in which you could swap it out was released like a dozen years ago.
Honestly, I'm not sure this is the question you're intending to ask; the chance that you buy a computer with a 32-bit processor from Dell *and* you can change the CPU *and* the same motherboard has a 64-bit processor you can swap in is effectively zero. And as noted, your current CPU is 64-bit and you cannot swap it out due to it being ball-grid array.