18859404 has 24 divisors (see below), whose sum is σ = 44610160. Its totient is φ = 6200064.

The previous prime is 18859397. The next prime is 18859417. The reversal of 18859404 is 40495881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9889 + ... + 11640.

Almost surely, 2^18859404 is an apocalyptic number.

It is an amenable number.

18859404 is an abundant number, since it is smaller than the sum of its proper divisors (25750756).

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

18859404 is a wasteful number, since it uses less digits than its factorization.

18859404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21609 (or 21607 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 18859404 is about 4342.7415304160. The cubic root of 18859404 is about 266.1803476688.

The spelling of 18859404 in words is "eighteen million, eight hundred fifty-nine thousand, four hundred four".