18199804 has 24 divisors (see below), whose sum is σ = 36499680. Its totient is φ = 7778496.

The previous prime is 18199801. The next prime is 18199823. The reversal of 18199804 is 40899181.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18199801) 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, 13614 + ... + 14890.

It is an arithmetic number, because the mean of its divisors is an integer number (1520820).

Almost surely, 2^18199804 is an apocalyptic number.

18199804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18199804 is an abundant number, since it is smaller than the sum of its proper divisors (18299876).

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

18199804 is a wasteful number, since it uses less digits than its factorization.

18199804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1795 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 18199804 is about 4266.1228299241. The cubic root of 18199804 is about 263.0402671747.

The spelling of 18199804 in words is "eighteen million, one hundred ninety-nine thousand, eight hundred four".