Is 20801 a prime number?

20 801 is an odd number, because it is not evenly divisible by 2.

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• What is an even number?

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 20 801 is about 144.226.

Thus, the square root of 20 801 is not an integer, and therefore 20 801 is not a square number.

The square of a number (here 20 801) is the result of the product of this number (20 801) by itself (i.e., 20 801 × 20 801); the square of 20 801 is sometimes called "raising 20 801 to the power 2", or "20 801 squared".

The square of 20 801 is 432 681 601 because 20 801 × 20 801 = 20 801² = 432 681 601.

As a consequence, 20 801 is the square root of 432 681 601.

20 801 is a number with 5 digits.

The multiples of 20 801 are all integers evenly divisible by 20 801, that is all numbers such that the remainder of the division by 20 801 is zero. There are infinitely many multiples of 20 801. The smallest multiples of 20 801 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 20 801 too, since 0 × 20 801 = 0
• 20 801: indeed, 20 801 is a multiple of itself, since 20 801 is evenly divisible by 20 801 (we have 20 801 / 20 801 = 1, so the remainder of this division is indeed zero)
• 41 602: indeed, 41 602 = 20 801 × 2
• 62 403: indeed, 62 403 = 20 801 × 3
• 83 204: indeed, 83 204 = 20 801 × 4
• 104 005: indeed, 104 005 = 20 801 × 5
• etc.

• Preceding numbers: …20 799, 20 800
• Following numbers: 20 802, 20 803…

Nearest numbers from 20 801

• Preceding prime number: 20 789
• Following prime number: 20 807

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• 20 801 est-il un nombre premier ?