18418894 has 16 divisors (see below), whose sum is σ = 29917440. Its totient is φ = 8454240.

The previous prime is 18418861. The next prime is 18418927. The reversal of 18418894 is 49881481.

It is an interprime number because it is at equal distance from previous prime (18418861) and next prime (18418927).

It is a self number, because there is not a number n which added to its sum of digits gives 18418894.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3112 + ... + 6820.

It is an arithmetic number, because the mean of its divisors is an integer number (1869840).

Almost surely, 2^18418894 is an apocalyptic number.

18418894 is a deficient number, since it is larger than the sum of its proper divisors (11498546).

18418894 is a wasteful number, since it uses less digits than its factorization.

18418894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915.

The product of its digits is 73728, while the sum is 43.

The square root of 18418894 is about 4291.7238960586. The cubic root of 18418894 is about 264.0915564749.

The spelling of 18418894 in words is "eighteen million, four hundred eighteen thousand, eight hundred ninety-four".