18530856 has 40 divisors (see below), whose sum is σ = 51905370. Its totient is φ = 6176736.

The previous prime is 18530851. The next prime is 18530861. The reversal of 18530856 is 65803581.

It is an interprime number because it is at equal distance from previous prime (18530851) and next prime (18530861).

It can be written as a sum of positive squares in only one way, i.e., 9922500 + 8608356 = 3150^2 + 2934^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18530856.

It is not an unprimeable number, because it can be changed into a prime (18530851) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13651 + ... + 14946.

Almost surely, 2^18530856 is an apocalyptic number.

It is an amenable number.

18530856 is an abundant number, since it is smaller than the sum of its proper divisors (33374514).

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

18530856 is a wasteful number, since it uses less digits than its factorization.

18530856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28615 (or 28602 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 18530856 is about 4304.7480762525. The cubic root of 18530856 is about 264.6255825451.

The spelling of 18530856 in words is "eighteen million, five hundred thirty thousand, eight hundred fifty-six".