18884864 has 36 divisors (see below), whose sum is σ = 38263680. Its totient is φ = 9300480.

The previous prime is 18884851. The next prime is 18884891. The reversal of 18884864 is 46848881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17657 + ... + 18695.

It is an arithmetic number, because the mean of its divisors is an integer number (1062880).

Almost surely, 2^18884864 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 18884864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19131840).

18884864 is an abundant number, since it is smaller than the sum of its proper divisors (19378816).

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

18884864 is an equidigital number, since it uses as much as digits as its factorization.

18884864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126 (or 1112 counting only the distinct ones).

The product of its digits is 393216, while the sum is 47.

The square root of 18884864 is about 4345.6718698033. The cubic root of 18884864 is about 266.3000740457.

The spelling of 18884864 in words is "eighteen million, eight hundred eighty-four thousand, eight hundred sixty-four".