18319026 has 32 divisors (see below), whose sum is σ = 40730688. Its totient is φ = 5445440.

The previous prime is 18319019. The next prime is 18319027. The reversal of 18319026 is 62091381.

It is a junction number, because it is equal to n+sod(n) for n = 18318984 and 18319002.

It is not an unprimeable number, because it can be changed into a prime (18319027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880 + ... + 6116.

It is an arithmetic number, because the mean of its divisors is an integer number (1272834).

Almost surely, 2^18319026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18319026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20365344).

18319026 is an abundant number, since it is smaller than the sum of its proper divisors (22411662).

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

18319026 is a wasteful number, since it uses less digits than its factorization.

18319026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 18319026 is about 4280.0731302164. The cubic root of 18319026 is about 263.6133861212.

The spelling of 18319026 in words is "eighteen million, three hundred nineteen thousand, twenty-six".