23404013 has 4 divisors (see below), whose sum is σ = 23429088. Its totient is φ = 23378940.

The previous prime is 23404009. The next prime is 23404021. The reversal of 23404013 is 31040432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23404013 - 2² = 23404009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23403982 and 23404000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23404033) 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, 11081 + ... + 13022.

It is an arithmetic number, because the mean of its divisors is an integer number (5857272).

Almost surely, 2^23404013 is an apocalyptic number.

It is an amenable number.

23404013 is a deficient number, since it is larger than the sum of its proper divisors (25075).

23404013 is an equidigital number, since it uses as much as digits as its factorization.

23404013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25074.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 23404013 is about 4837.7694240218. The cubic root of 23404013 is about 286.0422004007.

Adding to 23404013 its reverse (31040432), we get a palindrome (54444445).

The spelling of 23404013 in words is "twenty-three million, four hundred four thousand, thirteen".