18056818 has 32 divisors (see below), whose sum is σ = 30868992. Its totient is φ = 7862400.

The previous prime is 18056813. The next prime is 18056833. The reversal of 18056818 is 81865081.

It is not an unprimeable number, because it can be changed into a prime (18056813) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 34398 + ... + 34918.

It is an arithmetic number, because the mean of its divisors is an integer number (964656).

Almost surely, 2^18056818 is an apocalyptic number.

18056818 is a deficient number, since it is larger than the sum of its proper divisors (12812174).

18056818 is a wasteful number, since it uses less digits than its factorization.

18056818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610.

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 18056818 is about 4249.3314768326. The cubic root of 18056818 is about 262.3496003149.

The spelling of 18056818 in words is "eighteen million, fifty-six thousand, eight hundred eighteen".