22023018 has 24 divisors (see below), whose sum is σ = 48026628. Its totient is φ = 7293312.

The previous prime is 22022999. The next prime is 22023019. The reversal of 22023018 is 81032022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21095649 + 927369 = 4593^2 + 963^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22023019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1071 + ... + 6722.

Almost surely, 2^22023018 is an apocalyptic number.

22023018 is an abundant number, since it is smaller than the sum of its proper divisors (26003610).

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

22023018 is a wasteful number, since it uses less digits than its factorization.

22023018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958 (or 7955 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22023018 is about 4692.8688453866. The cubic root of 22023018 is about 280.3016222480.

The spelling of 22023018 in words is "twenty-two million, twenty-three thousand, eighteen".