18386004025 has 27 divisors (see below), whose sum is σ = 23334484269. Its totient is φ = 14370900480.

The previous prime is 18386004019. The next prime is 18386004059. The reversal of 18386004025 is 52040068381.

It is a happy number.

The square root of 18386004025 is 135595.

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

It can be written as a sum of positive squares in 4 ways, for example, as 5191346601 + 13194657424 = 72051^2 + 114868^2 .

It is not a de Polignac number, because 18386004025 - 2¹⁹ = 18385479737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31864537 + ... + 31865113.

Almost surely, 2^18386004025 is an apocalyptic number.

18386004025 is the 135595-th square number.

18386004025 is the 67798-th centered octagonal number.

It is an amenable number.

18386004025 is a deficient number, since it is larger than the sum of its proper divisors (4948480244).

18386004025 is an frugal number, since it uses more digits than its factorization.

18386004025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 18386004025 in words is "eighteen billion, three hundred eighty-six million, four thousand, twenty-five".