2005818804 has 36 divisors (see below), whose sum is σ = 5531198400. Its totient is φ = 607823760.

The previous prime is 2005818757. The next prime is 2005818821. The reversal of 2005818804 is 4088185002.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2532204 + ... + 2532995.

It is an arithmetic number, because the mean of its divisors is an integer number (153644400).

Almost surely, 2^2005818804 is an apocalyptic number.

It is an amenable number.

2005818804 is an abundant number, since it is smaller than the sum of its proper divisors (3525379596).

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

2005818804 is a wasteful number, since it uses less digits than its factorization.

2005818804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065220 (or 5065215 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 2005818804 is about 44786.3685064998. The cubic root of 2005818804 is about 1261.1417391081.

The spelling of 2005818804 in words is "two billion, five million, eight hundred eighteen thousand, eight hundred four".