How to replace word in notepad++ that begins with certain word plus number of bytes

How to replace word in notepad++ that begins with certain word plus number
of bytes

I want to replace that number with format of YYYYMMDDHHMMSS with "".
For example: 20130618100147 SOME TEXT HERE
I tried the to find the "2013(.*)$" in notepad++ (Regular Exp, Wraparound)
but every word that next to 2013 deleted in the same line. How can I able
to replace only the word starting with "2013" plus the 10 bytes?