18804444 has 12 divisors (see below), whose sum is σ = 43877064. Its totient is φ = 6268144.

The previous prime is 18804439. The next prime is 18804463. The reversal of 18804444 is 44440881.

It is a happy number.

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

It is a super-2 number, since 2×18804444² = 707214228298272, which contains 22 as substring.

18804444 is a modest number, since divided by 4444 gives 1880 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783507 + ... + 783530.

It is an arithmetic number, because the mean of its divisors is an integer number (3656422).

Almost surely, 2^18804444 is an apocalyptic number.

It is an amenable number.

18804444 is an abundant number, since it is smaller than the sum of its proper divisors (25072620).

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

18804444 is a wasteful number, since it uses less digits than its factorization.

18804444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567044 (or 1567042 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 33.

The square root of 18804444 is about 4336.4091135408. The cubic root of 18804444 is about 265.9215288533.

The spelling of 18804444 in words is "eighteen million, eight hundred four thousand, four hundred forty-four".