18040316 has 12 divisors (see below), whose sum is σ = 36080688. Its totient is φ = 7731552.

The previous prime is 18040277. The next prime is 18040327. The reversal of 18040316 is 61304081.

18040316 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18040291 and 18040300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322121 + ... + 322176.

It is an arithmetic number, because the mean of its divisors is an integer number (3006724).

Almost surely, 2^18040316 is an apocalyptic number.

It is an amenable number.

18040316 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18040316 is a wasteful number, since it uses less digits than its factorization.

18040316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644308 (or 644306 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 18040316 is about 4247.3893158033. The cubic root of 18040316 is about 262.2696561333.

Adding to 18040316 its reverse (61304081), we get a palindrome (79344397).

The spelling of 18040316 in words is "eighteen million, forty thousand, three hundred sixteen".