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
no..a natural number is a whole number
there is a zero in a natural number.
No, but is a natural number.
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.