Hello,
I am trying to convert some numbers from the screenshot below to string. I tried to add a letter in front of the number and then trim it, didn't work. Also, I tried to use ToNumber but it takes out the numbers from other rows where I have combinations of digits, letters and sometimes special characters. I cannot put the data type to be fixed decimal because I also have some other instances where it looks something like 1234_abcd_123 (up until 15 digits).
I modified with the help of Select Tool to any type of string (and forced), with no luck.

Thanks in advance!