18530863 has 4 divisors (see below), whose sum is σ = 19956328. Its totient is φ = 17105400.

The previous prime is 18530861. The next prime is 18530879. The reversal of 18530863 is 36803581.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18530863 - 2¹ = 18530861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530861) 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, 712713 + ... + 712738.

It is an arithmetic number, because the mean of its divisors is an integer number (4989082).

Almost surely, 2^18530863 is an apocalyptic number.

18530863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18530863 is a deficient number, since it is larger than the sum of its proper divisors (1425465).

18530863 is a wasteful number, since it uses less digits than its factorization.

18530863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425464.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18530863 is about 4304.7488893082. The cubic root of 18530863 is about 264.6256158657.

The spelling of 18530863 in words is "eighteen million, five hundred thirty thousand, eight hundred sixty-three".