18904885 has 8 divisors (see below), whose sum is σ = 23417856. Its totient is φ = 14635920.

The previous prime is 18904871. The next prime is 18904889. The reversal of 18904885 is 58840981.

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

It is not a de Polignac number, because 18904885 - 2¹¹ = 18902837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18904889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60829 + ... + 61138.

It is an arithmetic number, because the mean of its divisors is an integer number (2927232).

Almost surely, 2^18904885 is an apocalyptic number.

It is an amenable number.

18904885 is a deficient number, since it is larger than the sum of its proper divisors (4512971).

18904885 is a wasteful number, since it uses less digits than its factorization.

18904885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122003.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 18904885 is about 4347.9748159344. The cubic root of 18904885 is about 266.3941478107.

The spelling of 18904885 in words is "eighteen million, nine hundred four thousand, eight hundred eighty-five".