18506966 has 4 divisors (see below), whose sum is σ = 27760452. Its totient is φ = 9253482.

The previous prime is 18506953. The next prime is 18506977. The reversal of 18506966 is 66960581.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4626740 + ... + 4626743.

It is an arithmetic number, because the mean of its divisors is an integer number (6940113).

Almost surely, 2^18506966 is an apocalyptic number.

18506966 is a deficient number, since it is larger than the sum of its proper divisors (9253486).

18506966 is an equidigital number, since it uses as much as digits as its factorization.

18506966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9253485.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 18506966 is about 4301.9723383583. The cubic root of 18506966 is about 264.5118151104.

The spelling of 18506966 in words is "eighteen million, five hundred six thousand, nine hundred sixty-six".