18445966 has 24 divisors (see below), whose sum is σ = 34760880. Its totient is φ = 7186080.

The previous prime is 18445963. The next prime is 18445967. The reversal of 18445966 is 66954481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18445963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3751 + ... + 7138.

It is an arithmetic number, because the mean of its divisors is an integer number (1448370).

Almost surely, 2^18445966 is an apocalyptic number.

18445966 is a deficient number, since it is larger than the sum of its proper divisors (16314914).

18445966 is a wasteful number, since it uses less digits than its factorization.

18445966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10920 (or 10909 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 18445966 is about 4294.8767153435. The cubic root of 18445966 is about 264.2208799604.

The spelling of 18445966 in words is "eighteen million, four hundred forty-five thousand, nine hundred sixty-six".