18239853025 has 9 divisors (see below), whose sum is σ = 22618255123. Its totient is φ = 14591342200.

The previous prime is 18239853017. The next prime is 18239853091. The reversal of 18239853025 is 52035893281.

The square root of 18239853025 is 135055.

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., 6566347089 + 11673505936 = 81033^2 + 108044^2 .

It is not a de Polignac number, because 18239853025 - 2³ = 18239853017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 661770 + ... + 688780.

Almost surely, 2^18239853025 is an apocalyptic number.

18239853025 is the 135055-th square number.

18239853025 is the 67528-th centered octagonal number.

It is an amenable number.

18239853025 is a deficient number, since it is larger than the sum of its proper divisors (4378402098).

18239853025 is an frugal number, since it uses more digits than its factorization.

18239853025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54032 (or 27016 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 18239853025 in words is "eighteen billion, two hundred thirty-nine million, eight hundred fifty-three thousand, twenty-five".