18017966 has 16 divisors (see below), whose sum is σ = 28665360. Its totient is φ = 8470080.

The previous prime is 18017959. The next prime is 18017981. The reversal of 18017966 is 66971081.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3476 + ... + 6936.

It is an arithmetic number, because the mean of its divisors is an integer number (1791585).

Almost surely, 2^18017966 is an apocalyptic number.

18017966 is a deficient number, since it is larger than the sum of its proper divisors (10647394).

18017966 is a wasteful number, since it uses less digits than its factorization.

18017966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 18017966 is about 4244.7574724594. The cubic root of 18017966 is about 262.1613034643.

The spelling of 18017966 in words is "eighteen million, seventeen thousand, nine hundred sixty-six".