It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 20 237 is not a prime number.
For example, 20 237 can be divided by 7: 20 237 / 7 = 2 891.
For 20 237 to be a prime number, it would have been required that 20 237 has only two divisors, i.e., itself and 1.
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20 237 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 20 237 is about 142.257.
Thus, the square root of 20 237 is not an integer, and therefore 20 237 is not a square number.
The square of a number (here 20 237) is the result of the product of this number (20 237) by itself (i.e., 20 237 × 20 237); the square of 20 237 is sometimes called "raising 20 237 to the power 2", or "20 237 squared".
The square of 20 237 is 409 536 169 because 20 237 × 20 237 = 20 2372 = 409 536 169.
As a consequence, 20 237 is the square root of 409 536 169.
The multiples of 20 237 are all integers evenly divisible by 20 237, that is all numbers such that the remainder of the division by 20 237 is zero. There are infinitely many multiples of 20 237. The smallest multiples of 20 237 are: