18120589 has 6 divisors (see below), whose sum is σ = 19249514. Its totient is φ = 17054400.

The previous prime is 18120581. The next prime is 18120607. The reversal of 18120589 is 98502181.

It can be written as a sum of positive squares in 3 ways, for example, as 7064964 + 11055625 = 2658^2 + 3325^2 .

It is not a de Polignac number, because 18120589 - 2³ = 18120581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18120581) 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, 31062 + ... + 31639.

Almost surely, 2^18120589 is an apocalyptic number.

It is an amenable number.

18120589 is a deficient number, since it is larger than the sum of its proper divisors (1128925).

18120589 is an equidigital number, since it uses as much as digits as its factorization.

18120589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62735 (or 62718 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 18120589 is about 4256.8285142815. The cubic root of 18120589 is about 262.6580828603.

The spelling of 18120589 in words is "eighteen million, one hundred twenty thousand, five hundred eighty-nine".