18436804 has 24 divisors (see below), whose sum is σ = 33324480. Its totient is φ = 8918496.

The previous prime is 18436801. The next prime is 18436811. The reversal of 18436804 is 40863481.

It is a self number, because there is not a number n which added to its sum of digits gives 18436804.

It is not an unprimeable number, because it can be changed into a prime (18436801) 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, 51177 + ... + 51535.

It is an arithmetic number, because the mean of its divisors is an integer number (1388520).

Almost surely, 2^18436804 is an apocalyptic number.

It is an amenable number.

18436804 is a deficient number, since it is larger than the sum of its proper divisors (14887676).

18436804 is a wasteful number, since it uses less digits than its factorization.

18436804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 18436804 is about 4293.8099631912. The cubic root of 18436804 is about 264.1771270768.

It can be divided in two parts, 1843680 and 4, that multiplied together give a triangular number (7374720 = T₃₈₄₀).

The spelling of 18436804 in words is "eighteen million, four hundred thirty-six thousand, eight hundred four".