18074844 has 18 divisors (see below), whose sum is σ = 45689280. Its totient is φ = 6024936.

The previous prime is 18074839. The next prime is 18074857. The reversal of 18074844 is 44847081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 502079 = 18074844 / (1 + 8 + 0 + 7 + 4 + 8 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 18074799 and 18074808.

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 5 ways as a sum of consecutive naturals, for example, 251004 + ... + 251075.

Almost surely, 2^18074844 is an apocalyptic number.

It is an amenable number.

18074844 is an abundant number, since it is smaller than the sum of its proper divisors (27614436).

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

18074844 is a wasteful number, since it uses less digits than its factorization.

18074844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502089 (or 502084 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 18074844 is about 4251.4519872627. The cubic root of 18074844 is about 262.4368718945.

The spelling of 18074844 in words is "eighteen million, seventy-four thousand, eight hundred forty-four".