18966017 has 16 divisors (see below), whose sum is σ = 22708224. Its totient is φ = 15498000.

The previous prime is 18966011. The next prime is 18966019. The reversal of 18966017 is 71066981.

It is not a de Polignac number, because 18966017 - 2⁶ = 18965953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18966011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14792 + ... + 16022.

It is an arithmetic number, because the mean of its divisors is an integer number (1419264).

Almost surely, 2^18966017 is an apocalyptic number.

It is an amenable number.

18966017 is a deficient number, since it is larger than the sum of its proper divisors (3742207).

18966017 is a wasteful number, since it uses less digits than its factorization.

18966017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

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

The square root of 18966017 is about 4354.9990815154. Note that the first 3 decimals coincide. The cubic root of 18966017 is about 266.6809816968.

The spelling of 18966017 in words is "eighteen million, nine hundred sixty-six thousand, seventeen".