Number 13 in British English words is thirteen.
Number consists of 2 digits, two-digit.

Number 13 in American English words is thirteen, in German words is dreizehn, in French words is treize, in Spanish words is trece, in Italian words is tredici, in Dutch words is dertien, in Danish words is tretten.
If you want to write in words the number 13, it is necessary to use 8 characters.

Number 13 in binary code can be written 1101.

Number 13 in octal code can be written 15.

Number 13 in hexadecimal code can be written D.

Number 13 in Roman numerals is XIII.

Unix timestamp 13 converted to human readable date and time is Thursday January 1, 1970, 3:00 AM.

Decimal IP address 13 converted to dotted-decimal format is 0.0.0.13.

The square root of 13 is 3.605551275464.
Number 13 multiplied by 2 equals 26.
Divided by 2 equals 6.5.
The sum of all digits equals 4.
Number 13 raised to the power of 2 is 169.
Number 13 raised to the power of 3 is 2197.

The cosine of number 13 is 0.9074467814502.
The sine of number 13 is 0.42016703682664.
The tangent of number 13 is 0.46302113293649.
The radian equivalent of number 13 is 0.22689280275926.
The equivalent of number 13 in degrees is 744.84513367007.
The base-10 logarithm of number 13 is 1.1139433523068.

This number is odd number (an integer that is not evenly divisible by 2).
Number 13 is prime number, a natural number greater than 1 that has no positive divisors other than 1 and itself.