18022885 has 12 divisors (see below), whose sum is σ = 22236228. Its totient is φ = 14023296.

The previous prime is 18022883. The next prime is 18022889. The reversal of 18022885 is 58822081.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 708964 + 17313921 = 842^2 + 4161^2 .

It is not a de Polignac number, because 18022885 - 2¹ = 18022883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18022885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18022883) 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, 5529 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (1853019).

Almost surely, 2^18022885 is an apocalyptic number.

It is an amenable number.

18022885 is a deficient number, since it is larger than the sum of its proper divisors (4213343).

18022885 is an equidigital number, since it uses as much as digits as its factorization.

18022885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712 (or 2675 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 18022885 is about 4245.3368535371. The cubic root of 18022885 is about 262.1851584344.

The spelling of 18022885 in words is "eighteen million, twenty-two thousand, eight hundred eighty-five".