23440404331 has 4 divisors (see below), whose sum is σ = 23476634352. Its totient is φ = 23404174312.

The previous prime is 23440404307. The next prime is 23440404371. The reversal of 23440404331 is 13340404432.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23440404331 is a prime.

It is a super-2 number, since 2×23440404331² (a number of 22 digits) contains 22 as substring.

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 23440404331.

It is not an unprimeable number, because it can be changed into a prime (23440404371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18114040 + ... + 18115333.

It is an arithmetic number, because the mean of its divisors is an integer number (5869158588).

Almost surely, 2^23440404331 is an apocalyptic number.

23440404331 is a deficient number, since it is larger than the sum of its proper divisors (36230021).

23440404331 is an equidigital number, since it uses as much as digits as its factorization.

23440404331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36230020.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 23440404331 its reverse (13340404432), we get a palindrome (36780808763).

The spelling of 23440404331 in words is "twenty-three billion, four hundred forty million, four hundred four thousand, three hundred thirty-one".