11538018 has 32 divisors (see below), whose sum is σ = 26241600. Its totient is φ = 3755808.

The previous prime is 11538017. The next prime is 11538031. The reversal of 11538018 is 81083511.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11537982 and 11538000.

It is not an unprimeable number, because it can be changed into a prime (11538013) 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, 163 + ... + 4806.

It is an arithmetic number, because the mean of its divisors is an integer number (820050).

Almost surely, 2^11538018 is an apocalyptic number.

11538018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11538018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13120800).

11538018 is an abundant number, since it is smaller than the sum of its proper divisors (14703582).

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

11538018 is a wasteful number, since it uses less digits than its factorization.

11538018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5023 (or 5017 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 11538018 is about 3396.7658147126. The cubic root of 11538018 is about 225.9663327299.

The spelling of 11538018 in words is "eleven million, five hundred thirty-eight thousand, eighteen".