Remove spaces in in list of numbers - numbers are not displayed correctly

I have to read an Excel file originating from a website into R-Studios (xml). There is a row with numbers where there is unnecessary space between some digits, like: 

I wanted to remove the spaces, using STRG + H. Then the numbers are displayed such as: 

I tried to replace them with the normal form, but then the numbers are displaced incorrectly with a 0 at the end. How do I adress this problem so that all numbers are shown as (example):