18874938 has 8 divisors (see below), whose sum is σ = 37749888. Its totient is φ = 6291644.

The previous prime is 18874897. The next prime is 18874957. The reversal of 18874938 is 83947881.

It is a sphenic number, since it is the product of 3 distinct primes.

18874938 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1572906 + ... + 1572917.

It is an arithmetic number, because the mean of its divisors is an integer number (4718736).

Almost surely, 2^18874938 is an apocalyptic number.

18874938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18874938 is a wasteful number, since it uses less digits than its factorization.

18874938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145828.

The product of its digits is 387072, while the sum is 48.

The square root of 18874938 is about 4344.5296638416. The cubic root of 18874938 is about 266.2534095532.

The spelling of 18874938 in words is "eighteen million, eight hundred seventy-four thousand, nine hundred thirty-eight".