It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 20 002 009 is not a prime number.
For example, 20 002 009 can be divided by 43: 20 002 009 / 43 = 465 163.
For 20 002 009 to be a prime number, it would have been required that 20 002 009 has only two divisors, i.e., itself and 1.
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20 002 009 is an odd number, because it is not evenly divisible by 2.
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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 20 002 009 is about 4 472.361.
Thus, the square root of 20 002 009 is not an integer, and therefore 20 002 009 is not a square number.
The square of a number (here 20 002 009) is the result of the product of this number (20 002 009) by itself (i.e., 20 002 009 × 20 002 009); the square of 20 002 009 is sometimes called "raising 20 002 009 to the power 2", or "20 002 009 squared".
The square of 20 002 009 is 400 080 364 036 081 because 20 002 009 × 20 002 009 = 20 002 0092 = 400 080 364 036 081.
As a consequence, 20 002 009 is the square root of 400 080 364 036 081.
20 002 009 is a number with 8 digits.
The multiples of 20 002 009 are all integers evenly divisible by 20 002 009, that is all numbers such that the remainder of the division by 20 002 009 is zero. There are infinitely many multiples of 20 002 009. The smallest multiples of 20 002 009 are: