10  

Cardinal  10 ten 
Ordinal  10th (tenth) 
Numeral system  decimal 
Factorization  
Divisors  1, 2, 5, 10 
Roman numeral  X 
Unicode symbol(s)  X, x 
Greek Prefix  deca/deka 
Latin Prefix  deci 
Binary  1010_{2} 
Octal  12_{8} 
Duodecimal  A_{12} 
Hexadecimal  A_{16} 
  
Chinese numeral  十，拾 
Hebrew  י (Yod) 
Khmer  ១០ 
Korean  십 
Thai  ๑๐ 
Hindi  १० 
10 (ten) (pronounced /ˈtɛn/ ( listen)) is an even natural number following 9 and preceding 11.
Contents 
Ten is a composite number, its proper divisors being 1, 2 and 5. Ten is the smallest noncototient, a number that cannot be expressed as the difference between any integer and the total number of coprimes below it.
Ten is the second discrete semiprime (2.5) and the second member of the (2.q) discrete semiprime family. Ten has an aliquot sum σ(n) of 8 and is accordingly the first discrete semiprime to be in deficit. All subsequent discrete semiprimes are in deficit. The aliquot sequence for 10 comprises five members (10,8,7,1,0) with this number being the second composite member of the 7aliquot tree.
It is the aliquot sum of only one number the discrete semiprime 14.
Ten is a semimeandric number.
Ten is the sum of the first three prime numbers, of the four first numbers (1 + 2 + 3 + 4), of the square of the two first odd numbers and also of the first four factorials (0! + 1! + 2! + 3!). Ten is the eighth Perrin number, preceded in the sequence by 5, 5, 7.
A polygon with ten sides is a decagon, and 10 is a decagonal number. But it is also a triangular number and a centered triangular number.
Ten is the number of nQueens Problem solutions for n = 5.
Ten is the base of the decimal numeral system, by far the most common system of denoting numbers in both spoken and written language. Ten is the first twodigit number in decimal and thus the lowest number where the position of a numeral affects its value. Any integer written in the decimal system can be multiplied by ten by adding a zero to the end (e.g. 855 * 10 = 8550). The reason for the choice of ten is assumed to be that humans have ten fingers (digits).
The digit '1' followed by '0' is how the value of p is written in base p. (E.g. 16 in hexadecimal is 10.)
The Roman numeral for ten is X (which looks like two V's [the Roman numeral for 5] put together); it is thought that the V for five is derived from an open hand (five digits displayed). The Chinese word numeral for ten is 十, which resembles a cross.
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Base  Numeral system  Number 

1  unary  ********** 
2  binary  1010 
3  ternary  101 
4  quaternary  22 
5  quinary  20 
6  senary  14 
7  septenary  13 
8  octal  12 
9  novenary  11 
10  decimal  10 
over 10 (e.g., hexadecimal)  A 
Ten is a Harshad number in bases 2, 3, 5, 6, 9 and all others above.
Multiplication  1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  25  50  100  1000  

10  20  30  40  50  60  70  80  90  100  110  120  130  140  150  160  170  180  190  200  210  220  250  500  1000  10000 
Division  1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  

10  5  2.5  2  1.25  1  
0.1  0.2  0.3  0.4  0.5  0.6  0.7  0.8  0.9  1  1.1  1.2  1.3  1.4  1.5 
Exponentiation  1  2  3  4  5  6  7  8  9  10  11  12  13  

10  100  1000  10000  100000  1000000  10000000  100000000  1000000000  10000000000  100000000000  1000000000000  10000000000000  
1  1024  59049  1048576  9765625  60466176  282475249  1073741824  3486784401  10000000000  25937424601  61917364224  137858491849 
Ten is:
10 A.D., 10 B.C., 1910, 2010, etc.
Ten is the number that is after nine and before eleven. Most people have ten fingers and ten toes.
Ten is the smallest positive whole number with two digits. Ten is an important number because most people write numbers using multiples of ten. This is called the decimal number system.koi:10 (дас)
