18195966 has 24 divisors (see below), whose sum is σ = 40343160. Its totient is φ = 5924016.

The previous prime is 18195937. The next prime is 18196019. The reversal of 18195966 is 66959181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10981 + ... + 12528.

It is an arithmetic number, because the mean of its divisors is an integer number (1680965).

Almost surely, 2^18195966 is an apocalyptic number.

18195966 is an abundant number, since it is smaller than the sum of its proper divisors (22147194).

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

18195966 is a wasteful number, since it uses less digits than its factorization.

18195966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23560 (or 23557 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 18195966 is about 4265.6729832466. The cubic root of 18195966 is about 263.0217757756.

The spelling of 18195966 in words is "eighteen million, one hundred ninety-five thousand, nine hundred sixty-six".