23211940439 has 4 divisors (see below), whose sum is σ = 23491602456. Its totient is φ = 22932278424.

The previous prime is 23211940399. The next prime is 23211940441. The reversal of 23211940439 is 93404911232.

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 23211940439 - 2²⁰ = 23210891863 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 (23211940459) 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, 139830884 + ... + 139831049.

It is an arithmetic number, because the mean of its divisors is an integer number (5872900614).

Almost surely, 2^23211940439 is an apocalyptic number.

23211940439 is a deficient number, since it is larger than the sum of its proper divisors (279662017).

23211940439 is an equidigital number, since it uses as much as digits as its factorization.

23211940439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279662016.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 23211940439 in words is "twenty-three billion, two hundred eleven million, nine hundred forty thousand, four hundred thirty-nine".