var number = '18';
while (number.length < 9) { number += '0'; }
parseInt(number);
var number = '18';
number = number.padEnd(9, '0');
parseInt(number);
var number = '18';
parseInt((number.toString() + '000000000').substring(0, 8));
var numero = 18;
parseInt(numero * Math.pow(10, 8 - Math.log(numero) * Math.LOG10E + 1 | 0));