18804942 has 24 divisors (see below), whose sum is σ = 43878744. Its totient is φ = 5786064.

The previous prime is 18804913. The next prime is 18804943. The reversal of 18804942 is 24940881.

It is a junction number, because it is equal to n+sod(n) for n = 18804897 and 18804906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18804943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39948 + ... + 40415.

It is an arithmetic number, because the mean of its divisors is an integer number (1828281).

Almost surely, 2^18804942 is an apocalyptic number.

18804942 is an abundant number, since it is smaller than the sum of its proper divisors (25073802).

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

18804942 is a wasteful number, since it uses less digits than its factorization.

18804942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80384 (or 80381 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18804942 is about 4336.4665339421. The cubic root of 18804942 is about 265.9238763081.

The spelling of 18804942 in words is "eighteen million, eight hundred four thousand, nine hundred forty-two".