-14 could NOT be which type of number?

Hint:

Numbers that start from 1 and end at infinity are known as natural numbers.
Numbers that are whole numbers (not fractions) and include all positive and negative numbers, including 0 are known as integers.
Rational numbers are those numbers that can be represented as a simple fraction (either an integer or a decimal which is terminating or non-terminating & recurring).
Irrational number are those numbers that cannot be represented aas a simple fraction (non-terminating, non-recurring integers).
Real numbers are a union of rational and irrational numbers.