18508376825 has 12 divisors (see below), whose sum is σ = 23510154108. Its totient is φ = 14445561600.

The previous prime is 18508376779. The next prime is 18508376863. The reversal of 18508376825 is 52867380581.

It can be written as a sum of positive squares in 6 ways, for example, as 58859584 + 18449517241 = 7672^2 + 135829^2 .

It is not a de Polignac number, because 18508376825 - 2²⁰ = 18507328249 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, 9027452 + ... + 9029501.

It is an arithmetic number, because the mean of its divisors is an integer number (1959179509).

Almost surely, 2^18508376825 is an apocalyptic number.

It is an amenable number.

18508376825 is a deficient number, since it is larger than the sum of its proper divisors (5001777283).

18508376825 is a wasteful number, since it uses less digits than its factorization.

18508376825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18057004 (or 18056999 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 18508376825 in words is "eighteen billion, five hundred eight million, three hundred seventy-six thousand, eight hundred twenty-five".