www.mikescher.com/www/statics/euler/Euler_Problem-020.php

<?php

return 
[
	'number'      => 20,
	'date'        => '2014-09-14',
	'title'       => 'Factorial digit sum',
	'abbreviated' => false,
	'steps'       => 1546679,
	'time'        => 265,
	'width'       => 101,
	'height'      => 6,
	'value'       => 648,
];