20 is a natural number following 19 and preceding 21. It is an even number and can be divided by 1, 2, 4, 5, 10, and 20.
In mathematics, 20 is a composite number as it can be formed by multiplying 2 and 10 or as a product of prime numbers (2^2 * 5).
In the Roman numeral system, 20 is represented as XX.
In chemistry, 20 is the atomic number of calcium, a soft gray alkaline earth metal. Calcium is an essential element for living organisms, playing a vital role in bone health and tooth development.
In astrology, 20 is associated with the zodiac sign of Pisces. Individuals born between February 19 and March 20 are considered to be under the influence of this sign.
In sports, the number 20 holds significance in different sports. In football (soccer), the number 20 is traditionally associated with midfielders or attacking players. In ice hockey, the number 20 is often worn by a team's second-line forward.
The 20th wedding anniversary is commonly referred to as the china anniversary, as it is traditional to give gifts made of china to celebrate this milestone.
In popular culture, the number 20 appears in various forms. It is commonly used in countdowns such as "Top 20 Songs" or "Top 20 Movies". Additionally, the phrase "20/20 vision" is used to refer to excellent eyesight.
Historically, the year 20 AD represented the start of the 1st century, according to the Gregorian calendar.
Some famous people born on the 20th of a month include actress and humanitarian Audrey Hepburn, former US President George H. W. Bush, and German philosopher and composer Friedrich Nietzsche.
There are 20 amino acids that form the building blocks of proteins in living organisms.
The Mayflower Compact, a document signed by Pilgrims aboard the Mayflower ship in 1620, is an important milestone in American history.
The Twenty20 cricket format is a popular and fast-paced version of the sport, with matches typically lasting around 3 hours.
Twenty Thousand Leagues Under the Sea is a famous science fiction novel written by Jules Verne, first published in 1870.
The 20-dollar bill is a denomination of US currency, featuring a portrait of Andrew Jackson, the seventh president of the United States.
The number 20 is sometimes associated with the concept of "perfect vision" or clarity, as designated by the phrase "20/20."
In music, the song "Twenty One" by The Cranberries appears on their fourth studio album, "Bury the Hatchet."
The Russian Soyuz spacecraft, used for human spaceflight, has a maximum crew capacity of 3 people.
The Formula 1 World Championship consists of 20 races held in different countries each season, determining the world champion driver and constructor.
The 20th century brought significant advancements in technology, including the development of computers, the internet, and various medical breakthroughs.
The 20-sided die, also known as a icosahedron, is commonly used in role-playing games like Dungeons & Dragons.
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