18885 has 8 divisors (see below), whose sum is σ = 30240. Its totient is φ = 10064.

The previous prime is 18869. The next prime is 18899. The reversal of 18885 is 58881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18885 - 2⁴ = 18869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615 + ... + 644.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

2¹⁸⁸⁸⁵ is an apocalyptic number.

18885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18885 is a deficient number, since it is larger than the sum of its proper divisors (11355).

18885 is a wasteful number, since it uses less digits than its factorization.

18885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267.

The product of its digits is 2560, while the sum is 30.

The square root of 18885 is about 137.4227055475. The cubic root of 18885 is about 26.6300713301.

Adding to 18885 its sum of digits (30), we get a triangular number (18915 = T₁₉₄).

It can be divided in two parts, 18 and 885, that added together give a triangular number (903 = T₄₂).

The spelling of 18885 in words is "eighteen thousand, eight hundred eighty-five".