10

10 (ten) is a positive integer following 9 and preceding 11. Since humans have ten fingers, base 10 (the decimal system) is the leading numeral system used by humans worldwide. Its ordinal form is written "10th" or "tenth".
It is one of few non-single-digit numbers that has its own : 🔟‎
== Properties ==
* 10 is an .
* 10 is the 4th .
* 10 is the 3rd .
* A ten sided shape is called a decagon.
* 10 is the smallest number whose status is unknown whether it is or . It has no friends less than 10^30.
* 10 is the number for the French department of .
== In googology ==
Due to its ubiquity as a number base, many googologisms are based on the number ten:
* All the -illion numbers and SI prefixes (deca- in particular is exactly 10)
* Googol, googolplex and their variants
* Megiston
* A large portion of Jonathan Bowers' numbers (aside from those based on 3)
* Almost all of Sbiis Saibian's numbers. Menger sponge is a counterexample.
*In Greek-based number naming systems, 10 is associated with prefix deka-, and with prefix deci- in Latin systems.
*Using Sbiis Saibian's naming system, this number is called monologue.
*Aarex Tiaokhiao coined the names uoonol, 1-noogol, uagnol, ueenol, and uignol for this number.Part 1 (LAN) - Aarex Googology
*Wikia user NumLynx gave the name monoplex for this number, coined in analogy to the monologue.
*Username5243 coined the names goonol, doonol, toonol, tetoonol, penoonol, exoonol, eptoonol, ottoonol and ennoonol for this number, and it's equal to 10[1]1 = 10[2]1 = 10[3]1 = etc. in Username5243's Array Notation.Part 1 - My Large Numbers
*Nirvana Supermind coined zero-unol for this number, and it's equal to Q<10,1> in quick array notation.Numbers from quick array notation - Integral View
*SeveralLegend9998 coined mono-expanxis for this number, and it's equal to 10{{1}}1 in BEAF.SeveralLegend9998's New Googology Series (Retrieved 2024-06-04)
This is also the base of Saibian's Hyper-E notation ,that is Ea = 10^a.
=== Googological functions returning 10 ===
*Fusible numbers: \(m_1(2)=10\)
*C function: \(5C2=10\)
*In duodecimal, the digit eleven is normally represented by an upside-down 3 and is named "el".
In duodecimal, the digit ten is normally represented by an upside-down 2, or an "X" lookalike and is named "dek".
== As a cash denomination ==
Some currencies, such as the and the , have banknotes with this number in the denomination.
Some currencies, such as the , the (shekel-wise and Agorot-wise) and the , have coins with this number in the denomination.
== Sources ==
cs:10
es:10
Category:Numbers
Category:Banknote denominations
Category:Class 1
Category:Coin denominations
Category:Non-powers
Category:Numbers with 1 to 2 digits
 
Category:Googol Regiment
Category:Doogol Regiment
Category:Toogol Regiment