1804363809 has 16 divisors (see below), whose sum is σ = 2441070912. Its totient is φ = 1185357888.

The previous prime is 1804363787. The next prime is 1804363811. The reversal of 1804363809 is 9083634081.

It is a happy number.

It is not a de Polignac number, because 1804363809 - 2²⁰ = 1803315233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1804368809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89727 + ... + 107979.

It is an arithmetic number, because the mean of its divisors is an integer number (152566932).

Almost surely, 2^1804363809 is an apocalyptic number.

It is an amenable number.

1804363809 is a deficient number, since it is larger than the sum of its proper divisors (636707103).

1804363809 is a wasteful number, since it uses less digits than its factorization.

1804363809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18736.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1804363809 is about 42477.8037214732. The cubic root of 1804363809 is about 1217.4226268210.

The spelling of 1804363809 in words is "one billion, eight hundred four million, three hundred sixty-three thousand, eight hundred nine".