18874320 has 40 divisors (see below), whose sum is σ = 58511136. Its totient is φ = 5033088.

The previous prime is 18874313. The next prime is 18874321. The reversal of 18874320 is 2347881.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874321) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39082 + ... + 39561.

Almost surely, 2^18874320 is an apocalyptic number.

18874320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18874320 is an abundant number, since it is smaller than the sum of its proper divisors (39636816).

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

18874320 is a wasteful number, since it uses less digits than its factorization.

18874320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78659 (or 78653 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 18874320 is about 4344.4585393349. The cubic root of 18874320 is about 266.2505036469.

The spelling of 18874320 in words is "eighteen million, eight hundred seventy-four thousand, three hundred twenty".