Welcome to the dictionary of numbers

This page will tell you almost everything that it is necessary to know about number: 18
Let's begin with a basic information:

Number 18

Structure

Number 18 has 2 figures which are brought to 9. In English it sounds so: eighteen. Besides, the numbers representing number 18 are: one, eight.
Number 18 - decimal number which means that on the basis 10. 18 can be also presented in different bases, such as the Binary system of calculation also looks: 10010, the Octal system of an calculation also, also looks as and 16, in Hexadecimal system of calculation and looks as follows: . 18 The number in the triple system of reference looks like: in fourfold: 102 in pyatirichoy: in shestirichnoy: 30 in the septenary: . Also the number of number systems in from 4 to 34.

Characteristic

Number 18 is Positive and Even. His inverse number 0,055555555555556 and negative number -18. Number 18 can be divided on 1, 2, 3, 6, 9, 18 without the rest. Besides, it is not an ideal square, and it not a prime number. Now let's use trigonometrical functions. By means of sinusoidal function: Sin(18°) gives -0,751, using function of the Cosine of the cos function (18°) gives 0,66 and through the Tangent the tan function(18°) is made by -1,137. Arctangent number is 18 1,515, area of ​​a circle of radius equal to 18 1017,876 exponent in powers of 18 is 65659969,137.
Previous number: 17
Binary (base two): 10010
Number (base 4): 102
Number (base 6): 30
Number (base 8): 22
Number (base 10): 18
Number (base 12): 16
Number (base 14): 14
Number (base 16): 12
Number (base 18): 10
Number (base 20): i
Number (base 22): i
Number (base 24): i
Number (base 26): i
Number (base 28): i
Number (base 30): i
Number (base 32): i
Number (base 34): i
Inverse: 0,055555555555556
Counter: -18
Divisible by: 1, 2, 3, 6, 9, 18
Factorial number: 6,402373705728E+15
Number of digits: 2
Sum of digits: 9
Product of digits: 8
18 radian is equal (degree): 1031,324
Next number: 19
Number (base 3): 200
Number (base 5): 33
Number (base 7): 24
Number (base 9): 20
Number (base 11): 17
Number (base 13): 15
Number (base 15): 13
Number (base 17): 11
Number (base 19): i
Number (base 21): i
Number (base 23): i
Number (base 25): i
Number (base 27): i
Number (base 29): i
Number (base 31): i
Number (base 33): i
Even / Odd: Even
Unix Timestamp: Thu Jan 01 00:00:18 1970
Perfect square: NO
Prime: NO
Positive / Negative: Positive
English: eighteen
English digits: one, eight
Sin: -0,751
Cos: 0,66
Tan: -1,137
Atan: 1,515
Area of a circle r= 18: 1017,876
exhibitor (degree 18): 65659969,137