18240646025 has 12 divisors (see below), whose sum is σ = 25849601472. Its totient is φ = 12507871440.

The previous prime is 18240646013. The next prime is 18240646027. The reversal of 18240646025 is 52064604281.

It is not a de Polignac number, because 18240646025 - 2⁶ = 18240645961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18240646025.

It is not an unprimeable number, because it can be changed into a prime (18240646027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52115957 + ... + 52116306.

It is an arithmetic number, because the mean of its divisors is an integer number (2154133456).

Almost surely, 2^18240646025 is an apocalyptic number.

It is an amenable number.

18240646025 is a deficient number, since it is larger than the sum of its proper divisors (7608955447).

18240646025 is a wasteful number, since it uses less digits than its factorization.

18240646025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104232280 (or 104232275 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 18240646025 in words is "eighteen billion, two hundred forty million, six hundred forty-six thousand, twenty-five".