18685344 has 48 divisors (see below), whose sum is σ = 49412160. Its totient is φ = 6182400.

The previous prime is 18685327. The next prime is 18685351. The reversal of 18685344 is 44358681.

It is a tau number, because it is divible by the number of its divisors (48).

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, 13852 + ... + 15140.

It is an arithmetic number, because the mean of its divisors is an integer number (1029420).

Almost surely, 2^18685344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18685344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24706080).

18685344 is an abundant number, since it is smaller than the sum of its proper divisors (30726816).

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

18685344 is a wasteful number, since it uses less digits than its factorization.

18685344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453 (or 1445 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 18685344 is about 4322.6547398561. The cubic root of 18685344 is about 265.3589250558.

The spelling of 18685344 in words is "eighteen million, six hundred eighty-five thousand, three hundred forty-four".