18564000220 has 12 divisors (see below), whose sum is σ = 38984400504. Its totient is φ = 7425600080.

The previous prime is 18564000211. The next prime is 18564000223. The reversal of 18564000220 is 2200046581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18564000223) 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, 464099986 + ... + 464100025.

It is an arithmetic number, because the mean of its divisors is an integer number (3248700042).

Almost surely, 2^18564000220 is an apocalyptic number.

18564000220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18564000220 is an abundant number, since it is smaller than the sum of its proper divisors (20420400284).

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

18564000220 is a wasteful number, since it uses less digits than its factorization.

18564000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928200020 (or 928200018 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 18564000220 in words is "eighteen billion, five hundred sixty-four million, two hundred twenty", and thus it is an aban number.