23506013 has 4 divisors (see below), whose sum is σ = 23904480. Its totient is φ = 23107548.

The previous prime is 23506009. The next prime is 23506061. The reversal of 23506013 is 31060532.

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 23506013 - 2² = 23506009 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 (23506003) 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, 199145 + ... + 199262.

It is an arithmetic number, because the mean of its divisors is an integer number (5976120).

Almost surely, 2^23506013 is an apocalyptic number.

It is an amenable number.

23506013 is a deficient number, since it is larger than the sum of its proper divisors (398467).

23506013 is an equidigital number, since it uses as much as digits as its factorization.

23506013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398466.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 23506013 is about 4848.3000113442. The cubic root of 23506013 is about 286.4571437855.

Adding to 23506013 its reverse (31060532), we get a palindrome (54566545).

The spelling of 23506013 in words is "twenty-three million, five hundred six thousand, thirteen".