18573056089 has 9 divisors (see below), whose sum is σ = 21606501567. Its totient is φ = 15918944664.

The previous prime is 18573056063. The next prime is 18573056137. The reversal of 18573056089 is 98065037581.

The square root of 18573056089 is 136283.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6800806089 + 11772250000 = 82467^2 + 108500^2 .

It is not a de Polignac number, because 18573056089 - 2⁵ = 18573056057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18573056059) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 944247 + ... + 963715.

Almost surely, 2^18573056089 is an apocalyptic number.

18573056089 is the 136283-rd square number.

18573056089 is the 68142-nd centered octagonal number.

It is an amenable number.

18573056089 is a deficient number, since it is larger than the sum of its proper divisors (3033445478).

18573056089 is an frugal number, since it uses more digits than its factorization.

18573056089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38952 (or 19476 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 18573056089 in words is "eighteen billion, five hundred seventy-three million, fifty-six thousand, eighty-nine".