18530872 has 32 divisors (see below), whose sum is σ = 35640000. Its totient is φ = 9030528.

The previous prime is 18530861. The next prime is 18530879. The reversal of 18530872 is 27803581.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68754 + ... + 69022.

It is an arithmetic number, because the mean of its divisors is an integer number (1113750).

Almost surely, 2^18530872 is an apocalyptic number.

It is an amenable number.

18530872 is a deficient number, since it is larger than the sum of its proper divisors (17109128).

18530872 is a wasteful number, since it uses less digits than its factorization.

18530872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 18530872 is about 4304.7499346652. The cubic root of 18530872 is about 264.6256587065.

The spelling of 18530872 in words is "eighteen million, five hundred thirty thousand, eight hundred seventy-two".