11518138134018 has 48 divisors (see below), whose sum is σ = 25001531563320. Its totient is φ = 3832370212608.

The previous prime is 11518138134017. The next prime is 11518138134047. The reversal of 11518138134018 is 81043183181511.

11518138134018 is a `hidden beast` number, since 1 + 1 + 518 + 1 + 3 + 81 + 3 + 40 + 18 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2296852398369 + 9221285735649 = 1515537^2 + 3036657^2 .

It is not an unprimeable number, because it can be changed into a prime (11518138134017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201912996 + ... + 201970032.

Almost surely, 2^{11518138134018} is an apocalyptic number.

11518138134018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11518138134018 is an abundant number, since it is smaller than the sum of its proper divisors (13483393429302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11518138134018 is a wasteful number, since it uses less digits than its factorization.

11518138134018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77331 (or 77328 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 45.

The spelling of 11518138134018 in words is "eleven trillion, five hundred eighteen billion, one hundred thirty-eight million, one hundred thirty-four thousand, eighteen".