^(0*|-?0*[1-9]\d{0,8}|-?0*1\d{9}|-?0*20\d{8}|-?0*21[0-3]\d{7}|-?0*214[0-6]\d {6}|-?0*2147[0-3]\d{5}|-?0*21474[0-7]\d{4}|-?0*214748[0-2]\d{3}|-?0*2147483[ 0-5]\d{2}|-?0*21474836[0-3]\d|-?0*214748364[0-7]|-0*2147483648)$