18484221984 has 24 divisors (see below), whose sum is σ = 48521082960. Its totient is φ = 6161407296.

The previous prime is 18484221983. The next prime is 18484221989. The reversal of 18484221984 is 48912248481.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (18484221983) 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, 96271894 + ... + 96272085.

It is an arithmetic number, because the mean of its divisors is an integer number (2021711790).

Almost surely, 2^18484221984 is an apocalyptic number.

It is an amenable number.

18484221984 is an abundant number, since it is smaller than the sum of its proper divisors (30036860976).

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

18484221984 is a wasteful number, since it uses less digits than its factorization.

18484221984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192543992 (or 192543984 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 51.

The spelling of 18484221984 in words is "eighteen billion, four hundred eighty-four million, two hundred twenty-one thousand, nine hundred eighty-four".