18570089 has 6 divisors (see below), whose sum is σ = 19051326. Its totient is φ = 18090240.

The previous prime is 18570077. The next prime is 18570091. The reversal of 18570089 is 98007581.

It can be written as a sum of positive squares in 3 ways, for example, as 80089 + 18490000 = 283^2 + 4300^2 .

It is not a de Polignac number, because 18570089 - 2²⁰ = 17521513 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 (18570059) 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, 27257 + ... + 27929.

It is an arithmetic number, because the mean of its divisors is an integer number (3175221).

Almost surely, 2^18570089 is an apocalyptic number.

It is an amenable number.

18570089 is a deficient number, since it is larger than the sum of its proper divisors (481237).

18570089 is an frugal number, since it uses more digits than its factorization.

18570089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 18570089 is about 4309.3026117923. The cubic root of 18570089 is about 264.8122034837.

The spelling of 18570089 in words is "eighteen million, five hundred seventy thousand, eighty-nine".