18874856 has 64 divisors (see below), whose sum is σ = 47537280. Its totient is φ = 6785280.

The previous prime is 18874831. The next prime is 18874859. The reversal of 18874856 is 65847881.

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 18874856.

It is not an unprimeable number, because it can be changed into a prime (18874859) 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 15 ways as a sum of consecutive naturals, for example, 6830 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (742770).

Almost surely, 2^18874856 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 18874856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23768640).

18874856 is an abundant number, since it is smaller than the sum of its proper divisors (28662424).

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

18874856 is a wasteful number, since it uses less digits than its factorization.

18874856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394 (or 2390 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 18874856 is about 4344.5202266764. The cubic root of 18874856 is about 266.2530239835.

The spelling of 18874856 in words is "eighteen million, eight hundred seventy-four thousand, eight hundred fifty-six".