18026022 has 64 divisors (see below), whose sum is σ = 44352000. Its totient is φ = 4868640.

The previous prime is 18026009. The next prime is 18026027. The reversal of 18026022 is 22062081.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 18026022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18026027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38872 + ... + 39332.

It is an arithmetic number, because the mean of its divisors is an integer number (693000).

Almost surely, 2^18026022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18026022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22176000).

18026022 is an abundant number, since it is smaller than the sum of its proper divisors (26325978).

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

18026022 is a wasteful number, since it uses less digits than its factorization.

18026022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 18026022 is about 4245.7063016652. The cubic root of 18026022 is about 262.2003692275.

The spelling of 18026022 in words is "eighteen million, twenty-six thousand, twenty-two".