twenty thousand两万, two hundred thousand二十万 two million两百万 twenty million两千万 two hundred million两亿 two billion二十亿 twenty billion两百亿 two hundred billion两千亿
万ten thousand 十万one hundred thousand 百万、one million 千万ten million 亿、one hundred million 十亿1,000,000,000 a milliard,one milliard(美作:a billion,one billion)