100000000(억, 10 )은 99999999보다 크고 100000001보다 작은 자연수이다. 만(萬; 10000)의 만 배에 해당되며, 한자로는 '億'으로 표시한다. 영어로는 Hundred Million 이라고 표시한다.
100,000,000 (one hundred million) is the natural number following 99,999,999 and preceding 100,000,001. In scientific notation, it is written as 10 . East Asian languages treat 100,000,000 as a counting unit, significant as the square of a myriad, also a counting unit. In Chinese, Korean, and Japanese respectively it is yi (simplified Chinese: …