18745404 has 24 divisors (see below), whose sum is σ = 43825488. Its totient is φ = 6236160.

The previous prime is 18745403. The next prime is 18745409. The reversal of 18745404 is 40454781.

It is a super-2 number, since 2×18745404² = 702780342246432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18745403) 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, 6474 + ... + 8910.

It is an arithmetic number, because the mean of its divisors is an integer number (1826062).

Almost surely, 2^18745404 is an apocalyptic number.

It is an amenable number.

18745404 is an abundant number, since it is smaller than the sum of its proper divisors (25080084).

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

18745404 is a wasteful number, since it uses less digits than its factorization.

18745404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085 (or 3083 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 18745404 is about 4329.5962860294. The cubic root of 18745404 is about 265.6429339495.

The spelling of 18745404 in words is "eighteen million, seven hundred forty-five thousand, four hundred four".