18094644 has 24 divisors (see below), whose sum is σ = 46912320. Its totient is φ = 6031512.

The previous prime is 18094639. The next prime is 18094691. The reversal of 18094644 is 44649081.

It is a happy number.

18094644 is a `hidden beast` number, since 1 + 8 + 0 + 9 + 4 + 644 = 666.

It is a super-2 number, since 2×18094644² = 654832282973472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18094599 and 18094608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83664 + ... + 83879.

It is an arithmetic number, because the mean of its divisors is an integer number (1954680).

Almost surely, 2^18094644 is an apocalyptic number.

It is an amenable number.

18094644 is an abundant number, since it is smaller than the sum of its proper divisors (28817676).

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

18094644 is a wasteful number, since it uses less digits than its factorization.

18094644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167556 (or 167548 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 18094644 is about 4253.7799661007. The cubic root of 18094644 is about 262.5326653227.

The spelling of 18094644 in words is "eighteen million, ninety-four thousand, six hundred forty-four".