18406116 has 30 divisors (see below), whose sum is σ = 48118070. Its totient is φ = 6135264.

The previous prime is 18406109. The next prime is 18406153. The reversal of 18406116 is 61160481.

18406116 is a `hidden beast` number, since 1 + 8 + 40 + 611 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9585216 + 8820900 = 3096^2 + 2970^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18406116.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 28081 + ... + 28728.

Almost surely, 2^18406116 is an apocalyptic number.

It is an amenable number.

18406116 is an abundant number, since it is smaller than the sum of its proper divisors (29711954).

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

18406116 is a wasteful number, since it uses less digits than its factorization.

18406116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56825 (or 56814 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18406116 is about 4290.2349586008. The cubic root of 18406116 is about 264.0304716893.

Adding to 18406116 its reverse (61160481), we get a palindrome (79566597).

The spelling of 18406116 in words is "eighteen million, four hundred six thousand, one hundred sixteen".