It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 20 009 167 is not a prime number.
For example, 20 009 167 can be divided by 31: 20 009 167 / 31 = 645 457.
For 20 009 167 to be a prime number, it would have been required that 20 009 167 has only two divisors, i.e., itself and 1.
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20 009 167 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 20 009 167 is about 4 473.161.
Thus, the square root of 20 009 167 is not an integer, and therefore 20 009 167 is not a square number.
The square of a number (here 20 009 167) is the result of the product of this number (20 009 167) by itself (i.e., 20 009 167 × 20 009 167); the square of 20 009 167 is sometimes called "raising 20 009 167 to the power 2", or "20 009 167 squared".
The square of 20 009 167 is 400 366 764 033 889 because 20 009 167 × 20 009 167 = 20 009 1672 = 400 366 764 033 889.
As a consequence, 20 009 167 is the square root of 400 366 764 033 889.
20 009 167 is a number with 8 digits.
The multiples of 20 009 167 are all integers evenly divisible by 20 009 167, that is all numbers such that the remainder of the division by 20 009 167 is zero. There are infinitely many multiples of 20 009 167. The smallest multiples of 20 009 167 are: