[resolved] unwanted formatting of numbers

[solitario]

<?
for ($z=1; $z<=100; $z++) {
	$temp_time = (20050505113200 + $z);
echo $temp_time.'<br>';
}
?>

Hello everybody.
I'm trying to loop through, adding 1 to the variable $temp_time, however PHP is outputting this "2.00505051132E+013".

Instead I would like:
20050505113201
20050505113202
etc.

Any help is appreciated.