18985308 has 12 divisors (see below), whose sum is σ = 44299080. Its totient is φ = 6328432.

The previous prime is 18985301. The next prime is 18985319. The reversal of 18985308 is 80358981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18985308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18985301) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 791043 + ... + 791066.

It is an arithmetic number, because the mean of its divisors is an integer number (3691590).

Almost surely, 2^18985308 is an apocalyptic number.

It is an amenable number.

18985308 is an abundant number, since it is smaller than the sum of its proper divisors (25313772).

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

18985308 is a wasteful number, since it uses less digits than its factorization.

18985308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582116 (or 1582114 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 18985308 is about 4357.2133296409. The cubic root of 18985308 is about 266.7713679136.

The spelling of 18985308 in words is "eighteen million, nine hundred eighty-five thousand, three hundred eight".