After some testing, it looks like the Integer type on Online GDB's Pascal is really just a SmallInt (16-bit signed integer). Hence, it cannot store such a large number as 33555444.
Instead of Integer (, which is probably just a name for another type, depending on compiler options), try to use LongInt (32-bit signed integer) specifically for your DNI and your problem should be solved.
Here is a reference for data types.