23405013 has 12 divisors (see below), whose sum is σ = 34527168. Its totient is φ = 15271080.

The previous prime is 23404993. The next prime is 23405021. The reversal of 23405013 is 31050432.

It is not a de Polignac number, because 23405013 - 2⁵ = 23404981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23401013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27243 + ... + 28088.

It is an arithmetic number, because the mean of its divisors is an integer number (2877264).

Almost surely, 2^23405013 is an apocalyptic number.

It is an amenable number.

23405013 is a deficient number, since it is larger than the sum of its proper divisors (11122155).

23405013 is a wasteful number, since it uses less digits than its factorization.

23405013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55384 (or 55381 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 23405013 is about 4837.8727763347. The cubic root of 23405013 is about 286.0462743193.

Adding to 23405013 its reverse (31050432), we get a palindrome (54455445).

The spelling of 23405013 in words is "twenty-three million, four hundred five thousand, thirteen".