Oprah by the Numbers

Oprah Winfrey is celebrating 20 years on the air with an anniversary DVD. Here's a look at some of the numbers she's racked up over the past two decades:

19: Winfrey's age when she became the youngest person and first African-American woman to anchor the news in Nashville, Tenn.

22: Age she became a newscaster at WJZ-TV in Baltimore in 1976.

$275 million: Estimated annual revenue generated by Winfrey's businesses.

30 million: Average number of Americans who view her show each week. (It is broadcast internationally in 116 countries.)

$30 million-plus: Amount Winfrey's Angel Network has raised for nonprofit groups since 1998.

19: Number of years The Oprah Winfrey Show has been the top TV talk show.

12,000-15,000: Number of e-mails Oprah.com receives weekly.

55 million-plus: Number of U.S. homes in which Oxygen, the cable network for women she co-founded, is available.

$1 billion: Winfrey's fortune as estimated by Forbes magazine.

300: Number of people in her studio audience during any given show.

10: Number of shows where Julia Roberts has appeared. She is the most frequent celebrity guest.