Nearby Numbers

Positive, nonzero integers within three units

21020

Twenty-One Thousand and Twenty

21021

Twenty-One Thousand and Twenty-One

21022

Twenty-One Thousand and Twenty-Two

21024

Twenty-One Thousand and Twenty-Four

21025

Twenty-One Thousand and Twenty-Five

21026

Twenty-One Thousand and Twenty-Six

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

2.1023e4

Reciprocal

A number multiplied with its reciprocal is one.

0.00004756695048280455

The reciprocal of 21023.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 21023 is not a palindrome.

A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Twenty-one thousand and twenty-three is the 2366th prime number.   See primes in Base 10 Decimal

Not A Composite

Composites have more than just these two factors.

Twenty-One Thousand and Twenty-Three is not a composite number because it has exactly two factors: One and Twenty-One Thousand and Twenty-Three

Prime Factors

21023

Twenty-One Thousand and Twenty-Three

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

210231 = 21023

Base Conversions

The number twenty-one thousand and twenty-three in 35 different bases