Complex sentence: Americorps is a division of the Corporation for National and Community Service, along with Senior Corps and Learn and Serve America, with a total of more than 2,000,000 (two million) members in service each year.
Split into simpler sentences: AmeriCorps is a division of the Corporation for National and Community Service, which also oversees the Senior Corps and Learn and Serve America. Collectively, these three programs represent a total of more than 2 million members in service each year.