18804944 has 20 divisors (see below), whose sum is σ = 36502500. Its totient is φ = 9384960.

The previous prime is 18804943. The next prime is 18804959. The reversal of 18804944 is 44940881.

It can be written as a sum of positive squares in 2 ways, for example, as 9684544 + 9120400 = 3112^2 + 3020^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18804898 and 18804907.

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 3 ways as a sum of consecutive naturals, for example, 14432 + ... + 15680.

It is an arithmetic number, because the mean of its divisors is an integer number (1825125).

Almost surely, 2^18804944 is an apocalyptic number.

It is an amenable number.

18804944 is a deficient number, since it is larger than the sum of its proper divisors (17697556).

18804944 is a wasteful number, since it uses less digits than its factorization.

18804944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 18804944 is about 4336.4667645446. The cubic root of 18804944 is about 265.9238857356.

The spelling of 18804944 in words is "eighteen million, eight hundred four thousand, nine hundred forty-four".