18421818204 has 12 divisors (see below), whose sum is σ = 42984242504. Its totient is φ = 6140606064.

The previous prime is 18421818197. The next prime is 18421818229. The reversal of 18421818204 is 40281812481.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767575747 + ... + 767575770.

Almost surely, 2^18421818204 is an apocalyptic number.

It is an amenable number.

18421818204 is an abundant number, since it is smaller than the sum of its proper divisors (24562424300).

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

18421818204 is a wasteful number, since it uses less digits than its factorization.

18421818204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535151524 (or 1535151522 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The spelling of 18421818204 in words is "eighteen billion, four hundred twenty-one million, eight hundred eighteen thousand, two hundred four".