18873984 has 64 divisors (see below), whose sum is σ = 52338240. Its totient is φ = 6014976.

The previous prime is 18873977. The next prime is 18873997. The reversal of 18873984 is 48937881.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7764 + ... + 9900.

It is an arithmetic number, because the mean of its divisors is an integer number (817785).

Almost surely, 2^18873984 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 18873984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26169120).

18873984 is an abundant number, since it is smaller than the sum of its proper divisors (33464256).

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

18873984 is a wasteful number, since it uses less digits than its factorization.

18873984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177 (or 2165 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The square root of 18873984 is about 4344.4198692115. The cubic root of 18873984 is about 266.2489237101.

The spelling of 18873984 in words is "eighteen million, eight hundred seventy-three thousand, nine hundred eighty-four".