18088169 has 6 divisors (see below), whose sum is σ = 19882170. Its totient is φ = 16443680.

The previous prime is 18088163. The next prime is 18088177. The reversal of 18088169 is 96188081.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 5697769 = 3520^2 + 2387^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18088169 is a prime.

It is a super-2 number, since 2×18088169² = 654363715545122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18088163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74624 + ... + 74865.

It is an arithmetic number, because the mean of its divisors is an integer number (3313695).

Almost surely, 2^18088169 is an apocalyptic number.

It is an amenable number.

18088169 is a deficient number, since it is larger than the sum of its proper divisors (1794001).

18088169 is a wasteful number, since it uses less digits than its factorization.

18088169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149511 (or 149500 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 18088169 is about 4253.0188102100. The cubic root of 18088169 is about 262.5013466295.

The spelling of 18088169 in words is "eighteen million, eighty-eight thousand, one hundred sixty-nine".