18884012 has 72 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 7502880.

The previous prime is 18883999. The next prime is 18884029. The reversal of 18884012 is 21048881.

It is a super-2 number, since 2×18884012² = 713211818432288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18884012.

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, 265937 + ... + 266007.

It is an arithmetic number, because the mean of its divisors is an integer number (574560).

Almost surely, 2^18884012 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 18884012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20684160).

18884012 is an abundant number, since it is smaller than the sum of its proper divisors (22484308).

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

18884012 is a wasteful number, since it uses less digits than its factorization.

18884012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 18884012 is about 4345.5738401274. The cubic root of 18884012 is about 266.2960692321.

The spelling of 18884012 in words is "eighteen million, eight hundred eighty-four thousand, twelve".