18056863 has 16 divisors (see below), whose sum is σ = 20736000. Its totient is φ = 15563680.

The previous prime is 18056833. The next prime is 18056867. The reversal of 18056863 is 36865081.

It is not a de Polignac number, because 18056863 - 2⁹ = 18056351 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 (18056867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37458 + ... + 37936.

It is an arithmetic number, because the mean of its divisors is an integer number (1296000).

Almost surely, 2^18056863 is an apocalyptic number.

18056863 is a deficient number, since it is larger than the sum of its proper divisors (2679137).

18056863 is a wasteful number, since it uses less digits than its factorization.

18056863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18056863 is about 4249.3367717798. The cubic root of 18056863 is about 262.3498182515.

It can be divided in two parts, 1805 and 6863, that added together give a palindrome (8668).

The spelling of 18056863 in words is "eighteen million, fifty-six thousand, eight hundred sixty-three".