It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 18 984 is not a prime number.
For example, 18 984 can be divided by 2: 18 984 / 2 = 9 492.
For 18 984 to be a prime number, it would have been required that 18 984 has only two divisors, i.e., itself and 1.
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18 984 is an even number, because it is evenly divisible by 2: 18 984 / 2 = 9 492.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 18 984 is about 137.782.
Thus, the square root of 18 984 is not an integer, and therefore 18 984 is not a square number.
The square of a number (here 18 984) is the result of the product of this number (18 984) by itself (i.e., 18 984 × 18 984); the square of 18 984 is sometimes called "raising 18 984 to the power 2", or "18 984 squared".
The square of 18 984 is 360 392 256 because 18 984 × 18 984 = 18 9842 = 360 392 256.
As a consequence, 18 984 is the square root of 360 392 256.
The multiples of 18 984 are all integers evenly divisible by 18 984, that is all numbers such that the remainder of the division by 18 984 is zero. There are infinitely many multiples of 18 984. The smallest multiples of 18 984 are: