23118013 has 4 divisors (see below), whose sum is σ = 24123168. Its totient is φ = 22112860.

The previous prime is 23118001. The next prime is 23118019. The reversal of 23118013 is 31081132.

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 23118013 - 2⁵ = 23117981 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 (23118019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502543 + ... + 502588.

It is an arithmetic number, because the mean of its divisors is an integer number (6030792).

Almost surely, 2^23118013 is an apocalyptic number.

23118013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23118013 is a deficient number, since it is larger than the sum of its proper divisors (1005155).

23118013 is a wasteful number, since it uses less digits than its factorization.

23118013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005154.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 23118013 is about 4808.1194868680. The cubic root of 23118013 is about 284.8722644982.

Adding to 23118013 its reverse (31081132), we get a palindrome (54199145).

The spelling of 23118013 in words is "twenty-three million, one hundred eighteen thousand, thirteen".