11111040018 has 24 divisors (see below), whose sum is σ = 25925760588. Its totient is φ = 3418781472.

The previous prime is 11111040007. The next prime is 11111040037. The reversal of 11111040018 is 81004011111.

It is a happy number.

11111040018 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9937497969 + 1173542049 = 99687^2 + 34257^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 23741305 + ... + 23741772.

Almost surely, 2^11111040018 is an apocalyptic number.

11111040018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11111040018 is an abundant number, since it is smaller than the sum of its proper divisors (14814720570).

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

11111040018 is a wasteful number, since it uses less digits than its factorization.

11111040018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47483098 (or 47483095 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11111040018 its reverse (81004011111), we get a palindrome (92115051129).

The spelling of 11111040018 in words is "eleven billion, one hundred eleven million, forty thousand, eighteen".