Do you think you know everything about the number 18? Here you can test your knowledge about this number, and find out if they are correct, or if you still had things to know about the number 18. Do not know what can be useful to know the characteristics of the number 18? Think about how many times you use numbers in your daily life, surely there are more than you thought. Knowing more about the number 18 will help you take advantage of all that this number can offer you.

18 is a natural number (hence integer, rational and real) of 2 digits that follows 17 and precedes 19.

18 is an even number, since it is divisible by 2.

The number 18 is a unique number, with its own characteristics that, for some reason, has caught your attention. It is logical, we use numbers every day, in multiple ways and almost without realizing it, but knowing more about the number 18 can help you benefit from that knowledge, and be of great use. If you keep reading, we will give you all the facts you need to know about the number 18, you will see how many of them you already knew, but we are sure you will also discover some new ones.

Number 18 in English is written aseighteen

The number 18 is pronounced digit by digit as (1) one (8) eight.

The number 18 has 6 divisors, they are as follows:

The sum of its divisors, excluding the number itself is 21, so it is an abundant number and its abundance is 3The factorization into prime factors of 18 is:

2^{1}*3^{2}

The square root of 18 is. 4.2426406871193

The square of 18, the result of multiplying 18*18 is. 324

The decimal number 18 into binary numbers is.10010

The decimal number 18 in octal numbers is22

The decimal number 18 in hexadecimal numbers is12

The neperian or natural logarithm of 18 is.2.8903717578962

The base 10 logarithm of 18 is1.2552725051033

The sine of 18 radians is.-0.75098724677168

The cosine of 18 radians is. 0.66031670824408

The tangent of 18 radians is.-1.1373137123377

Surely there are many things about the number 18 that you already knew, others you have discovered on this website. Your curiosity about the number 18 says a lot about you. That you have researched to know in depth the properties of the number 18 means that you are a person interested in understanding your surroundings. Numbers are the alphabet with which mathematics is written, and mathematics is the language of the universe. To know more about the number 18 is to know the universe better. On this page we have for you many facts about numbers that, properly applied, can help you exploit all the potential that the number 18 has to explain what surrounds us..