18266135115 has 16 divisors (see below), whose sum is σ = 30168585216. Its totient is φ = 9427682400.

The previous prime is 18266135113. The next prime is 18266135119. The reversal of 18266135115 is 51153166281.

It is a happy number.

It is not a de Polignac number, because 18266135115 - 2¹ = 18266135113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18266135113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19640541 + ... + 19641470.

It is an arithmetic number, because the mean of its divisors is an integer number (1885536576).

Almost surely, 2^18266135115 is an apocalyptic number.

18266135115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18266135115 is a deficient number, since it is larger than the sum of its proper divisors (11902450101).

18266135115 is a wasteful number, since it uses less digits than its factorization.

18266135115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39282050.

The product of its digits is 43200, while the sum is 39.

The spelling of 18266135115 in words is "eighteen billion, two hundred sixty-six million, one hundred thirty-five thousand, one hundred fifteen".