To install and use 64-bit 【【【Xubuntu】】】, you need an Intel or AMD 64-bit processor with at least 512 MB of memory. You can also try Xubuntu with a USB or DVD with the same amount of memory. Keep in mind that running the system from a USB or DVD will be slower than an installed system.
When you install Xubuntu, you need about 8 GB of free space on your hard disk.
Your 32-bit processor needs to support PAE in order to run the 32-bit version of Xubuntu 18.04.