18530874 has 24 divisors (see below), whose sum is σ = 40551732. Its totient is φ = 6115200.

The previous prime is 18530861. The next prime is 18530879. The reversal of 18530874 is 47803581.

It can be written as a sum of positive squares in 2 ways, for example, as 15657849 + 2873025 = 3957^2 + 1695^2 .

It is not an unprimeable number, because it can be changed into a prime (18530879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3279 + ... + 6914.

Almost surely, 2^18530874 is an apocalyptic number.

18530874 is an abundant number, since it is smaller than the sum of its proper divisors (22020858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18530874 is a wasteful number, since it uses less digits than its factorization.

18530874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10302 (or 10299 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 18530874 is about 4304.7501669667. The cubic root of 18530874 is about 264.6256682267.

The spelling of 18530874 in words is "eighteen million, five hundred thirty thousand, eight hundred seventy-four".