21314344423 has 4 divisors (see below), whose sum is σ = 21315137680. Its totient is φ = 21313551168.

The previous prime is 21314344417. The next prime is 21314344453. The reversal of 21314344423 is 32444341312.

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 21314344423 - 2⁵ = 21314344391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314344453) 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, 354858 + ... + 410551.

It is an arithmetic number, because the mean of its divisors is an integer number (5328784420).

Almost surely, 2^21314344423 is an apocalyptic number.

21314344423 is a deficient number, since it is larger than the sum of its proper divisors (793257).

21314344423 is an equidigital number, since it uses as much as digits as its factorization.

21314344423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793256.

The product of its digits is 27648, while the sum is 31.

Adding to 21314344423 its reverse (32444341312), we get a palindrome (53758685735).

The spelling of 21314344423 in words is "twenty-one billion, three hundred fourteen million, three hundred forty-four thousand, four hundred twenty-three".