18530428 has 18 divisors (see below), whose sum is σ = 37723056. Its totient is φ = 7941528.

The previous prime is 18530419. The next prime is 18530431. The reversal of 18530428 is 82403581.

It is a self number, because there is not a number n which added to its sum of digits gives 18530428.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 47076 + ... + 47467.

Almost surely, 2^18530428 is an apocalyptic number.

It is an amenable number.

18530428 is an abundant number, since it is smaller than the sum of its proper divisors (19192628).

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

18530428 is a wasteful number, since it uses less digits than its factorization.

18530428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94561 (or 94552 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 18530428 is about 4304.6983634164. The cubic root of 18530428 is about 264.6235452112.

The spelling of 18530428 in words is "eighteen million, five hundred thirty thousand, four hundred twenty-eight".