18818819004 has 24 divisors (see below), whose sum is σ = 44026447360. Its totient is φ = 6256386864.

The previous prime is 18818819003. The next prime is 18818819009. The reversal of 18818819004 is 40091881881.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18818819003) 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, 2064364 + ... + 2073459.

Almost surely, 2^18818819004 is an apocalyptic number.

It is an amenable number.

18818819004 is an abundant number, since it is smaller than the sum of its proper divisors (25207628356).

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

18818819004 is a wasteful number, since it uses less digits than its factorization.

18818819004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138209 (or 4138207 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 48.

The spelling of 18818819004 in words is "eighteen billion, eight hundred eighteen million, eight hundred nineteen thousand, four".