18730864 has 10 divisors (see below), whose sum is σ = 36291080. Its totient is φ = 9365424.

The previous prime is 18730861. The next prime is 18730867. The reversal of 18730864 is 46803781.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18730861) and next prime (18730867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18730861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585324 + ... + 585355.

It is an arithmetic number, because the mean of its divisors is an integer number (3629108).

Almost surely, 2^18730864 is an apocalyptic number.

It is an amenable number.

18730864 is a deficient number, since it is larger than the sum of its proper divisors (17560216).

18730864 is a wasteful number, since it uses less digits than its factorization.

18730864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170687 (or 1170681 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 18730864 is about 4327.9168199031. The cubic root of 18730864 is about 265.5742336015.

The spelling of 18730864 in words is "eighteen million, seven hundred thirty thousand, eight hundred sixty-four".