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Watch the official 20/20 online at ABC.com. Get exclusive videos, blogs, photos, cast bios, free episodes.
20 is a natural number with various mathematical, scientific, cultural and historical significance. Learn about its factorization, tessellations, polyhedra, sporadic groups, Rubik's cube, atomic number, vision, sports and more.
- twenty
- 20th, (twentieth)
- 2² × 5
- vigesimal
Learn the meaning, history, and usage of the word twenty, a number equal to two times 10. See examples, synonyms, phrases, and related words for twenty.
ABC News' "20/20" is an award-winning primetime program anchored by David Muir and Deborah Roberts. A proven leader as a long-form newsmagazine for over 40 years, "20/20" features unforgettable, character-driven true crime mysteries, exclusive newsmaker interviews, hard-hitting investigative reports and in-depth coverage of high profile stories.
20/20 full episode guide offers a synopsis for every episode in case you missed a show. Browse the list of episode titles to find summary recap you need to get caught up. Visit The official 20/20 online at ABC.com. Get exclusive videos, blogs, photos, cast bios, free episodes and more.
Learn about the properties, factors, and uses of the number 20 in different systems and languages. Find out why 20 is an abundant number, a base 20 system, and a polyhedron.
Twenty definition: a cardinal number, 10 times 2.. See examples of TWENTY used in a sentence.
