18122859 has 20 divisors (see below), whose sum is σ = 27808704. Its totient is φ = 11753424.

The previous prime is 18122851. The next prime is 18122887. The reversal of 18122859 is 95822181.

It is not a de Polignac number, because 18122859 - 2³ = 18122851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18122851) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27 + ... + 6020.

Almost surely, 2^18122859 is an apocalyptic number.

18122859 is a deficient number, since it is larger than the sum of its proper divisors (9685845).

18122859 is an equidigital number, since it uses as much as digits as its factorization.

18122859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096 (or 6087 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 18122859 is about 4257.0951363577. The cubic root of 18122859 is about 262.6690502917.

It can be divided in two parts, 18122 and 859, that added together give a palindrome (18981).

The spelling of 18122859 in words is "eighteen million, one hundred twenty-two thousand, eight hundred fifty-nine".