18831966 has 8 divisors (see below), whose sum is σ = 37663944. Its totient is φ = 6277320.

The previous prime is 18831959. The next prime is 18832003. The reversal of 18831966 is 66913881.

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

18831966 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1569325 + ... + 1569336.

It is an arithmetic number, because the mean of its divisors is an integer number (4707993).

Almost surely, 2^18831966 is an apocalyptic number.

18831966 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.

18831966 is a wasteful number, since it uses less digits than its factorization.

18831966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138666.

The product of its digits is 62208, while the sum is 42.

The square root of 18831966 is about 4339.5813162101. The cubic root of 18831966 is about 266.0511989939.

The spelling of 18831966 in words is "eighteen million, eight hundred thirty-one thousand, nine hundred sixty-six".