18015268113 has 12 divisors (see below), whose sum is σ = 26115999988. Its totient is φ = 11966819040.

The previous prime is 18015268099. The next prime is 18015268129. The reversal of 18015268113 is 31186251081.

18015268113 is a `hidden beast` number, since 18 + 0 + 1 + 526 + 8 + 113 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3001177089 + 15014091024 = 54783^2 + 122532^2 .

It is not a de Polignac number, because 18015268113 - 2²⁰ = 18014219537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18015268163) 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, 3610678 + ... + 3615663.

Almost surely, 2^18015268113 is an apocalyptic number.

It is an amenable number.

18015268113 is a deficient number, since it is larger than the sum of its proper divisors (8100731875).

18015268113 is a wasteful number, since it uses less digits than its factorization.

18015268113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7226624 (or 7226621 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 18015268113 in words is "eighteen billion, fifteen million, two hundred sixty-eight thousand, one hundred thirteen".