18984992 has 48 divisors (see below), whose sum is σ = 41150592. Its totient is φ = 8567040.

The previous prime is 18984991. The next prime is 18985003. The reversal of 18984992 is 29948981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18984992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18984991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19067 + ... + 20037.

It is an arithmetic number, because the mean of its divisors is an integer number (857304).

Almost surely, 2^18984992 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 18984992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20575296).

18984992 is an abundant number, since it is smaller than the sum of its proper divisors (22165600).

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

18984992 is a wasteful number, since it uses less digits than its factorization.

18984992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1033 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 18984992 is about 4357.1770677814. The cubic root of 18984992 is about 266.7698878178.

The spelling of 18984992 in words is "eighteen million, nine hundred eighty-four thousand, nine hundred ninety-two".