18874944 has 140 divisors (see below), whose sum is σ = 61222128. Its totient is φ = 5702400.

The previous prime is 18874897. The next prime is 18874957. The reversal of 18874944 is 44947881.

It is a super-2 number, since 2×18874944² = 712527022006272, which contains 22 as substring.

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 18874944.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56859 + ... + 57189.

Almost surely, 2^18874944 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 18874944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30611064).

18874944 is an abundant number, since it is smaller than the sum of its proper divisors (42347184).

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

18874944 is a wasteful number, since it uses less digits than its factorization.

18874944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 347 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 18874944 is about 4344.5303543651. The cubic root of 18874944 is about 266.2534377656.

The spelling of 18874944 in words is "eighteen million, eight hundred seventy-four thousand, nine hundred forty-four".