18874224 has 30 divisors (see below), whose sum is σ = 52822016. Its totient is φ = 6291360.

The previous prime is 18874217. The next prime is 18874231. The reversal of 18874224 is 42247881.

It is an interprime number because it is at equal distance from previous prime (18874217) and next prime (18874231).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65392 + ... + 65679.

Almost surely, 2^18874224 is an apocalyptic number.

It is an amenable number.

18874224 is an abundant number, since it is smaller than the sum of its proper divisors (33947792).

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

18874224 is a wasteful number, since it uses less digits than its factorization.

18874224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131085 (or 131076 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 18874224 is about 4344.4474907634. The cubic root of 18874224 is about 266.2500522383.

The spelling of 18874224 in words is "eighteen million, eight hundred seventy-four thousand, two hundred twenty-four".