20
Twenty or 20 may refer to:

20 (number), the natural number following 19 and preceding 21
one of the years 20 BC, AD 20, 1920, 2020

Science
Calcium, an alkaline earth metal in the periodic table found in bones and teeth
20 Massalia, an asteroid in the asteroid belt

Music
Albums
20 (2nd Chapter of Acts album), 1992
20 (Cunter album), 2011
20 (Dragana Mirković album), 2012
20 (Harry Connick, Jr. album), 1988
20 (Jan Smit album), 2016
20 (Kate Rusby album), 2012
20 (Terminaator album), 2007
20 (TLC album), 2013
20 (No Angels album), 2021
#20 (Edmond Leung album), 2011
20th (album), by Casiopea, 2000
20 [Twenty], an album released in Japan by South Korean rock band F.T. Island, 2012
Twenty (Boyz II Men album), 2011
Twenty (Chicane album), 2016
Twenty (Jebediah album), 2015
Twenty (Lynyrd Skynyrd album), 1997
Twenty (Robert Cray album), 2005
Twenty (Taking Back Sunday album), 2019

Songs
"Twenty" (The Rippingtons song) from 20th Anniversary, 2006
"Twenty", a song by Karma to Burn from the album Wild, Wonderful Purgatory, 1999

Tours
The Twenty Tour, a 2019 music concert tour by Irish pop vocal band Westlife
Twenty (concert), a 2006 music concert by Filipina singer Regine Velasquez

Places
Twenty, Lincolnshire, a hamlet in England
Twenty railway station, a former railroad station in Lincolnshire, England
The Twenty, Georgia or West Green, an American unincorporated community in Coffee County
Twenty Lake, a lake in Minnesota
Twenty Lakes Basin, in California's eastern Sierra

Other uses
20 (TV channel), Italy
Twenty (film), a 2015 South Korean film
20, the international dialing code for Egypt.

See also
Twenty dollar bill (disambiguation)
Twenty pence (disambiguation)
XX (disambiguation)
XX Corps (disambiguation)
List of highways numbered 20