18806659775 has 12 divisors (see below), whose sum is σ = 23394773472. Its totient is φ = 14997253440.

The previous prime is 18806659763. The next prime is 18806659777. The reversal of 18806659775 is 57795660881.

It is a de Polignac number, because none of the positive numbers 2^k-18806659775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18806659777) 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, 1193879 + ... + 1209528.

It is an arithmetic number, because the mean of its divisors is an integer number (1949564456).

Almost surely, 2^18806659775 is an apocalyptic number.

18806659775 is a deficient number, since it is larger than the sum of its proper divisors (4588113697).

18806659775 is a wasteful number, since it uses less digits than its factorization.

18806659775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403730 (or 2403725 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 62.

The spelling of 18806659775 in words is "eighteen billion, eight hundred six million, six hundred fifty-nine thousand, seven hundred seventy-five".