18607966 has 48 divisors (see below), whose sum is σ = 33362784. Its totient is φ = 7717248.

The previous prime is 18607961. The next prime is 18607969. The reversal of 18607966 is 66970681.

It is a super-4 number, since 4×18607966⁴ (a number of 30 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18607961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 502900 + ... + 502936.

It is an arithmetic number, because the mean of its divisors is an integer number (695058).

Almost surely, 2^18607966 is an apocalyptic number.

18607966 is a deficient number, since it is larger than the sum of its proper divisors (14754818).

18607966 is a wasteful number, since it uses less digits than its factorization.

18607966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 18607966 is about 4313.6951677187. The cubic root of 18607966 is about 264.9921250775.

The spelling of 18607966 in words is "eighteen million, six hundred seven thousand, nine hundred sixty-six".