18564000113 has 4 divisors (see below), whose sum is σ = 18590184180. Its totient is φ = 18537816048.

The previous prime is 18564000079. The next prime is 18564000149. The reversal of 18564000113 is 31100046581.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3907750144 + 14656249969 = 62512^2 + 121063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18564000113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18564000163) 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, 13090970 + ... + 13092387.

It is an arithmetic number, because the mean of its divisors is an integer number (4647546045).

Almost surely, 2^18564000113 is an apocalyptic number.

It is an amenable number.

18564000113 is a deficient number, since it is larger than the sum of its proper divisors (26184067).

18564000113 is an equidigital number, since it uses as much as digits as its factorization.

18564000113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26184066.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 18564000113 its reverse (31100046581), we get a palindrome (49664046694).

The spelling of 18564000113 in words is "eighteen billion, five hundred sixty-four million, one hundred thirteen", and thus it is an aban number.