18320966 has 4 divisors (see below), whose sum is σ = 27481452. Its totient is φ = 9160482.

The previous prime is 18320963. The next prime is 18320971. The reversal of 18320966 is 66902381.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18320963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4580240 + ... + 4580243.

It is an arithmetic number, because the mean of its divisors is an integer number (6870363).

Almost surely, 2^18320966 is an apocalyptic number.

18320966 is a deficient number, since it is larger than the sum of its proper divisors (9160486).

18320966 is an equidigital number, since it uses as much as digits as its factorization.

18320966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9160485.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 18320966 is about 4280.2997558582. The cubic root of 18320966 is about 263.6226914179.

The spelling of 18320966 in words is "eighteen million, three hundred twenty thousand, nine hundred sixty-six".