wrong numbers sort

I faced with a problem that not all data is correctly sorted in table – mostly it’s ok, but sometimes 9 hundred thousand in any million number stands lower than 0 and 1 hundred thousands.
https://mbch.guide/en/arenas/istoriya-proxodnyx/
like here. I’m getting data for this table using php code from csv file.
in table numbers are in text format and listed as “19 234 123” – with a simple spaces