21314323 has 4 divisors (see below), whose sum is σ = 21470040. Its totient is φ = 21158608.

The previous prime is 21314303. The next prime is 21314327. The reversal of 21314323 is 32341312.

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 21314323 - 2⁵ = 21314291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21314323.

It is not an unprimeable number, because it can be changed into a prime (21314327) 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, 77653 + ... + 77926.

It is an arithmetic number, because the mean of its divisors is an integer number (5367510).

Almost surely, 2^21314323 is an apocalyptic number.

21314323 is a deficient number, since it is larger than the sum of its proper divisors (155717).

21314323 is a wasteful number, since it uses less digits than its factorization.

21314323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155716.

The product of its digits is 432, while the sum is 19.

The square root of 21314323 is about 4616.7437659025. The cubic root of 21314323 is about 277.2621038269.

Adding to 21314323 its reverse (32341312), we get a palindrome (53655635).

The spelling of 21314323 in words is "twenty-one million, three hundred fourteen thousand, three hundred twenty-three".