18699804 has 36 divisors (see below), whose sum is σ = 47469240. Its totient is φ = 6206880.

The previous prime is 18699803. The next prime is 18699823. The reversal of 18699804 is 40899681.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18699804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18699803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8719 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (1318590).

Almost surely, 2^18699804 is an apocalyptic number.

It is an amenable number.

18699804 is an abundant number, since it is smaller than the sum of its proper divisors (28769436).

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

18699804 is a wasteful number, since it uses less digits than its factorization.

18699804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210 (or 2205 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 18699804 is about 4324.3269996613. The cubic root of 18699804 is about 265.4273583813.

It can be divided in two parts, 18699 and 804, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 18699804 in words is "eighteen million, six hundred ninety-nine thousand, eight hundred four".