18200400404 has 12 divisors (see below), whose sum is σ = 31854127200. Its totient is φ = 9099221208.

The previous prime is 18200400401. The next prime is 18200400419. The reversal of 18200400404 is 40400400281.

It is a self number, because there is not a number n which added to its sum of digits gives 18200400404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18200400401) 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 3 ways as a sum of consecutive naturals, for example, 202094 + ... + 277925.

It is an arithmetic number, because the mean of its divisors is an integer number (2654510600).

Almost surely, 2^18200400404 is an apocalyptic number.

It is an amenable number.

18200400404 is a deficient number, since it is larger than the sum of its proper divisors (13653726796).

18200400404 is a wasteful number, since it uses less digits than its factorization.

18200400404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489502 (or 489500 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 18200400404 its reverse (40400400281), we get a palindrome (58600800685).

The spelling of 18200400404 in words is "eighteen billion, two hundred million, four hundred thousand, four hundred four".