[n00el]

Hello.

How to format this number '201234567' to this - '20 123 4567'?

[Schneider]

You mean you want the first 2 digits to be together, then the next 3, then the next 4, then the next 5, et cetra?

[zT KiNgKoNg]

All i can say is, before asking try to search and fix the issue on your own, or create a function that will do it for you. Frankly this post to you may seem like a waste of time, but what would truly waste my time is doing what you should have done in the first place.