18530089 has 4 divisors (see below), whose sum is σ = 18548224. Its totient is φ = 18511956.

The previous prime is 18530069. The next prime is 18530107. The reversal of 18530089 is 98003581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98003581 = 13 ⋅7538737.

It is a cyclic number.

It is not a de Polignac number, because 18530089 - 2⁷ = 18529961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18530059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7437 + ... + 9610.

It is an arithmetic number, because the mean of its divisors is an integer number (4637056).

Almost surely, 2^18530089 is an apocalyptic number.

It is an amenable number.

18530089 is a deficient number, since it is larger than the sum of its proper divisors (18135).

18530089 is a wasteful number, since it uses less digits than its factorization.

18530089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18134.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18530089 is about 4304.6589876551. The cubic root of 18530089 is about 264.6219315063.

The spelling of 18530089 in words is "eighteen million, five hundred thirty thousand, eighty-nine".