18089361 has 12 divisors (see below), whose sum is σ = 26218192. Its totient is φ = 12018456.

The previous prime is 18089333. The next prime is 18089371. The reversal of 18089361 is 16398081.

It is not a de Polignac number, because 18089361 - 2⁵ = 18089329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18089371) 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, 511 + ... + 6036.

Almost surely, 2^18089361 is an apocalyptic number.

It is an amenable number.

18089361 is a deficient number, since it is larger than the sum of its proper divisors (8128831).

18089361 is a wasteful number, since it uses less digits than its factorization.

18089361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6860 (or 6857 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18089361 is about 4253.1589436559. The cubic root of 18089361 is about 262.5071127324.

The spelling of 18089361 in words is "eighteen million, eighty-nine thousand, three hundred sixty-one".