18604966 has 4 divisors (see below), whose sum is σ = 27907452. Its totient is φ = 9302482.

The previous prime is 18604931. The next prime is 18604967. The reversal of 18604966 is 66940681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66940681 = 769 ⋅87049.

It is a super-2 number, since 2×18604966² = 692289519722312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18604967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4651240 + ... + 4651243.

It is an arithmetic number, because the mean of its divisors is an integer number (6976863).

Almost surely, 2^18604966 is an apocalyptic number.

18604966 is a deficient number, since it is larger than the sum of its proper divisors (9302486).

18604966 is an equidigital number, since it uses as much as digits as its factorization.

18604966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9302485.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 18604966 is about 4313.3474239852. The cubic root of 18604966 is about 264.9778835227.

The spelling of 18604966 in words is "eighteen million, six hundred four thousand, nine hundred sixty-six".