18336009025 has 12 divisors (see below), whose sum is σ = 22831001644. Its totient is φ = 14607936000.

The previous prime is 18336009019. The next prime is 18336009047. The reversal of 18336009025 is 52090063381.

It can be written as a sum of positive squares in 6 ways, for example, as 33166081 + 18302842944 = 5759^2 + 135288^2 .

It is not a de Polignac number, because 18336009025 - 2⁹ = 18336008513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1515636 + ... + 1527685.

Almost surely, 2^18336009025 is an apocalyptic number.

It is an amenable number.

18336009025 is a deficient number, since it is larger than the sum of its proper divisors (4494992619).

18336009025 is a wasteful number, since it uses less digits than its factorization.

18336009025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043572 (or 3043567 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 18336009025 in words is "eighteen billion, three hundred thirty-six million, nine thousand, twenty-five".