18538184025 has 81 divisors (see below), whose sum is σ = 34498610679. Its totient is φ = 9515600640.

The previous prime is 18538184017. The next prime is 18538184053. The reversal of 18538184025 is 52048183581.

The square root of 18538184025 is 136155.

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

18538184025 is a `hidden beast` number, since 18 + 538 + 1 + 84 + 0 + 25 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 18512051481 + 26132544 = 136059^2 + 5112^2 .

It is not a de Polignac number, because 18538184025 - 2³ = 18538184017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 59227269 + ... + 59227581.

Almost surely, 2^18538184025 is an apocalyptic number.

18538184025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18538184025 is the 136155-th square number.

18538184025 is the 68078-th centered octagonal number.

It is an amenable number.

18538184025 is a deficient number, since it is larger than the sum of its proper divisors (15960426654).

18538184025 is an equidigital number, since it uses as much as digits as its factorization.

18538184025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 18538184025 in words is "eighteen billion, five hundred thirty-eight million, one hundred eighty-four thousand, twenty-five".