Twenty is an integer. Not sure what you mean with "in humans".
It is a cardinal number.
The twenty-three chromosomes in humans is called a haploid number. It refers to the number of chromosomes in a gamete of an organism.
yes
23 is a Prime number because it has only two factors which are itself and one.
rational or real
Humans normally have ten fingers and ten toes, a total of twenty digits.
Its and even number, but probably... having 46 chromosomes would make humans a diploid being
One in twenty people have an extra rib.
The decimal number for six and twenty-three twenty-fifths is 6.92
It is twenty.
Twentyone follows twenty
20,020
21 is not a prime number.