18884484 has 72 divisors (see below), whose sum is σ = 51498720. Its totient is φ = 5812992.

The previous prime is 18884473. The next prime is 18884521. The reversal of 18884484 is 48448881.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35847 + ... + 36369.

It is an arithmetic number, because the mean of its divisors is an integer number (715260).

Almost surely, 2^18884484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18884484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25749360).

18884484 is an abundant number, since it is smaller than the sum of its proper divisors (32614236).

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

18884484 is a wasteful number, since it uses less digits than its factorization.

18884484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 604 counting only the distinct ones).

The product of its digits is 262144, while the sum is 45.

The square root of 18884484 is about 4345.6281479206. The cubic root of 18884484 is about 266.2982878761.

The spelling of 18884484 in words is "eighteen million, eight hundred eighty-four thousand, four hundred eighty-four".