18530256 has 20 divisors (see below), whose sum is σ = 47869952. Its totient is φ = 6176736.

The previous prime is 18530251. The next prime is 18530261. The reversal of 18530256 is 65203581.

It is an interprime number because it is at equal distance from previous prime (18530251) and next prime (18530261).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530251) 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, 192976 + ... + 193071.

Almost surely, 2^18530256 is an apocalyptic number.

18530256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18530256 is an abundant number, since it is smaller than the sum of its proper divisors (29339696).

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

18530256 is a wasteful number, since it uses less digits than its factorization.

18530256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386058 (or 386052 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 18530256 is about 4304.6783851991. The cubic root of 18530256 is about 264.6227264607.

The spelling of 18530256 in words is "eighteen million, five hundred thirty thousand, two hundred fifty-six".