When you select a column format to Number or Currency, PDF2XL will send that format to the Excel program which, in turn, formats the cells so that your data shows as a number or currency.
However, in some cases, you might notice that the converted data is being changed to a Text format in Excel.
If this occurs, check the length of your numbers in the document. Excel has a limit of 15 characters for number formats, so if it's longer than that, it will change it to text.
If your number isn't too long and still being converted in Text, please let us know so we can investigate the problem.