18684344 has 32 divisors (see below), whose sum is σ = 40418400. Its totient is φ = 7931520.

The previous prime is 18684319. The next prime is 18684373. The reversal of 18684344 is 44348681.

It is a junction number, because it is equal to n+sod(n) for n = 18684298 and 18684307.

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, 4574 + ... + 7634.

It is an arithmetic number, because the mean of its divisors is an integer number (1263075).

Almost surely, 2^18684344 is an apocalyptic number.

18684344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18684344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20209200).

18684344 is an abundant number, since it is smaller than the sum of its proper divisors (21734056).

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

18684344 is a wasteful number, since it uses less digits than its factorization.

18684344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183 (or 3179 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 18684344 is about 4322.5390686494. The cubic root of 18684344 is about 265.3541911557.

The spelling of 18684344 in words is "eighteen million, six hundred eighty-four thousand, three hundred forty-four".