18333966 has 16 divisors (see below), whose sum is σ = 41906304. Its totient is φ = 5238264.

The previous prime is 18333943. The next prime is 18333983. The reversal of 18333966 is 66933381.

It is a super-2 number, since 2×18333966² = 672268618578312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218220 + ... + 218303.

It is an arithmetic number, because the mean of its divisors is an integer number (2619144).

Almost surely, 2^18333966 is an apocalyptic number.

18333966 is an abundant number, since it is smaller than the sum of its proper divisors (23572338).

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

18333966 is a wasteful number, since it uses less digits than its factorization.

18333966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436535.

The product of its digits is 69984, while the sum is 39.

The square root of 18333966 is about 4281.8180718008. The cubic root of 18333966 is about 263.6850295559.

The spelling of 18333966 in words is "eighteen million, three hundred thirty-three thousand, nine hundred sixty-six".