What is the 20th letter of the alphabet?

The 20th letter of the alphabet is "T". It is a consonant and is pronounced as /ti:/ in English. The letter "T" is derived from the Phoenician letter "Teth" and is a common letter used in many words in the English language. It is also used in various other languages like French, Spanish, German, and many more. In Morse code, the letter "T" is represented by a single dash. The uppercase form of "T" is written as "T" and the lowercase form is written as "t". In mathematics, the letter "T" is used to represent a variable or a symbol for the perpendicular symbol.