21314023 has 4 divisors (see below), whose sum is σ = 21361120. Its totient is φ = 21266928.

The previous prime is 21314011. The next prime is 21314053. The reversal of 21314023 is 32041312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21314023 - 2²¹ = 19216871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21313988 and 21314006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22863 + ... + 23776.

It is an arithmetic number, because the mean of its divisors is an integer number (5340280).

Almost surely, 2^21314023 is an apocalyptic number.

21314023 is a deficient number, since it is larger than the sum of its proper divisors (47097).

21314023 is an equidigital number, since it uses as much as digits as its factorization.

21314023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47096.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21314023 is about 4616.7112753561. The cubic root of 21314023 is about 277.2608029955.

Adding to 21314023 its reverse (32041312), we get a palindrome (53355335).

The spelling of 21314023 in words is "twenty-one million, three hundred fourteen thousand, twenty-three".