SQL & PL/SQL

I want to be able to remove characters from a string only up to the first numeric value.  If there are any after the numeric I want to keep them.

e.g. 'AB1234'  should become '1234',     'AB1234C' should become '1234C'.

There also could be spaces and other types of characters at the start.  I have tried this:

select

regexp_replace('ABC1234', '[^[:digit:]]'),

regexp_replace('AB 1234', '[^[:digit:]]'),

regexp_replace('AB 01234', '[^[:digit:]]'),

regexp_replace('AB1234C', '[^[:digit:]]'),

regexp_replace('^1234', '[^[:digit:]]'),

regexp_replace('*#1234Z', '[^[:digit:]]')

FROM DUAL

For all except 'AB 01234' it returns '1234' so it only keeps the numeric.    For 'AB 01234' it correctly returns '01234'

The ones incorrect are those with a character after the numeric e.g. 'AB1234C'.

I know I am missing something here, can anyone please help with this?

Thanks