No, -20 is not a natural number. It is an integer.
No, it is a rational number, because all natural numbers are rational.
21
21
20 is both rational and natural. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
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The Set a natural number between four and 20
the answer is like numbers that come in a row like 7 or 8 and 19 and 20.
1, 2, 4, 5, 10, 20, 25, 50, 100
The sum of the squares of the first 20 natural numbers 1 to 20 is 2,870.
20 has four factors less than 6: 1, 2, 4 & 5A factor of a number is normally defined as a natural number (i.e. a positive integer/positive whole number; thus 0 is not included) which divides into that number giving a natural number as a result. Therefore all natural numbers will have at least 4 factors unless they are prime numbers(which, by definition, only have 2 factors).The number 20 has the following factors:1,20,2,10,4 & 5.Do you see how I have written the factors so that they are paired together as the multiples that give 20? (E.g. 1 and 20 etc... Often you will see factors written as, for example 1 x 20, 2 x 10, 4 x 5).If we re-order those factors into ascending order we will get:1,2,4,5,10 & 20.So those less than 6 are: 1, 2, 4 & 5.
Depending on your definition of a natural number, 0 may or may not be a natural number. If you don't think 0 is a natural number, then it will be the only non-natural number that is whole.
no..a natural number is a whole number