18555840496 has 20 divisors (see below), whose sum is σ = 37844149000. Its totient is φ = 8789608512.

The previous prime is 18555840491. The next prime is 18555840529. The reversal of 18555840496 is 69404855581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18555840491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30519171 + ... + 30519778.

It is an arithmetic number, because the mean of its divisors is an integer number (1892207450).

Almost surely, 2^18555840496 is an apocalyptic number.

18555840496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18555840496 is an abundant number, since it is smaller than the sum of its proper divisors (19288308504).

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

18555840496 is a wasteful number, since it uses less digits than its factorization.

18555840496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61038976 (or 61038970 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 55.

The spelling of 18555840496 in words is "eighteen billion, five hundred fifty-five million, eight hundred forty thousand, four hundred ninety-six".