18022089 has 8 divisors (see below), whose sum is σ = 25294240. Its totient is φ = 11382336.

The previous prime is 18022073. The next prime is 18022097. The reversal of 18022089 is 98022081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18022089 - 2⁴ = 18022073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18022019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158032 + ... + 158145.

It is an arithmetic number, because the mean of its divisors is an integer number (3161780).

Almost surely, 2^18022089 is an apocalyptic number.

18022089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18022089 is a deficient number, since it is larger than the sum of its proper divisors (7272151).

18022089 is a wasteful number, since it uses less digits than its factorization.

18022089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316199.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18022089 is about 4245.2431025796. The cubic root of 18022089 is about 262.1812984815.

The spelling of 18022089 in words is "eighteen million, twenty-two thousand, eighty-nine".