18984812 has 48 divisors (see below), whose sum is σ = 42239232. Its totient is φ = 7250880.

The previous prime is 18984793. The next prime is 18984817. The reversal of 18984812 is 21848981.

It is a super-3 number, since 3×18984812³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18984812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18984817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15743 + ... + 16905.

It is an arithmetic number, because the mean of its divisors is an integer number (879984).

Almost surely, 2^18984812 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 18984812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21119616).

18984812 is an abundant number, since it is smaller than the sum of its proper divisors (23254420).

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

18984812 is a wasteful number, since it uses less digits than its factorization.

18984812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1236 counting only the distinct ones).

The product of its digits is 36864, while the sum is 41.

The square root of 18984812 is about 4357.1564121569. The cubic root of 18984812 is about 266.7690447180.

The spelling of 18984812 in words is "eighteen million, nine hundred eighty-four thousand, eight hundred twelve".