Q:
# Is 19 a prime number?

**The number 19 is the eighth prime number.** A prime number is a positive, whole number that is only divisible by one and itself. Nineteen is also the seventh Mersenne prime exponent, which is a prime number that is one less than a power of two.

Out of the first 100 numbers, 25 of them are prime numbers. The opposite of a prime number is a composite number. Because all even numbers are divisible by two, the number two is the only even prime number. Similarly, no prime numbers that are higher than five end in five. One is a unique number because it is neither a prime number nor a composite number.

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Q:
## Which number has the most factors?

A: The number with the most factors is infinite. The number with the most known factors contains all of the prime numbers, of which Euclid's theorem also sugg... Full Answer >Filed Under: -
Q:
## What is the highest number in the world?

A: Integers proceed upward in an infinite sequence, so no number can be said to be the "highest," as it is always possible to add one and get a higher number.... Full Answer >Filed Under: -
Q:
## What is the smallest whole number?

A: The smallest whole number is zero. The set of whole numbers includes all natural numbers and the number 0. There is not a largest whole number, as the set ... Full Answer >Filed Under: -
Q:
## What are place values in mathematics?

A: A place value is the value of the place of the digit in a number. The value of each place is 10 times the place to its right. For instance, a digit in the ... Full Answer >Filed Under: