This is just FYI.
Intel wanted the market to move to IA64 or a new 64-bit architecture when they moved from 32-bit to 64-bit. However IA64 (intel itanium 64-bit) was not backwards compatible with x86 (32-bit) meaning everyone had to start with new systems (including all new software).
AMD created AMD64 or what can also be called x86_64 (official name is amd64) which was backward compatible meaning it could run older 32-bit code, and it sold well in the marketplace.
IA64 or intel’s system failed (in the marketplace), AMD’s very quickly became the standard. Intel have since dropped IA64 and produce amd64 CPUs (under agreement with AMD).
Also not all intel Atom cpus are amd64, early ones are x86 only, eg. the intel atom n270 in my asus eepc runs Lubuntu 18.04 LTS perfectly (even later 18.10 & 19.04 x86) but as it’s not amd64 it can’t run later releases.
Your intel atom appears to be a much later n455 atom which is amd64 as @That_Random_Guy said