It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 300 000 018 is not a prime number.
For example, 300 000 018 can be divided by 2: 300 000 018 / 2 = 150 000 009.
For 300 000 018 to be a prime number, it would have been required that 300 000 018 has only two divisors, i.e., itself and 1.
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300 000 018 is an even number, because it is evenly divisible by 2: 300 000 018 / 2 = 150 000 009.
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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 300 000 018 is about 17 320.509.
Thus, the square root of 300 000 018 is not an integer, and therefore 300 000 018 is not a square number.
The square of a number (here 300 000 018) is the result of the product of this number (300 000 018) by itself (i.e., 300 000 018 × 300 000 018); the square of 300 000 018 is sometimes called "raising 300 000 018 to the power 2", or "300 000 018 squared".
The square of 300 000 018 is 90 000 010 800 000 320 because 300 000 018 × 300 000 018 = 300 000 0182 = 90 000 010 800 000 320.
As a consequence, 300 000 018 is the square root of 90 000 010 800 000 320.
300 000 018 is a number with 9 digits.
The multiples of 300 000 018 are all integers evenly divisible by 300 000 018, that is all numbers such that the remainder of the division by 300 000 018 is zero. There are infinitely many multiples of 300 000 018. The smallest multiples of 300 000 018 are: