18265736208 has 20 divisors (see below), whose sum is σ = 47186485328. Its totient is φ = 6088578720.

The previous prime is 18265736171. The next prime is 18265736227. The reversal of 18265736208 is 80263756281.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 380536171 = 18265736208 / (1 + 8 + 2 + 6 + 5 + 7 + 3 + 6 + 2 + 0 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190268038 + ... + 190268133.

Almost surely, 2^18265736208 is an apocalyptic number.

It is an amenable number.

18265736208 is an abundant number, since it is smaller than the sum of its proper divisors (28920749120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18265736208 is a wasteful number, since it uses less digits than its factorization.

18265736208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380536182 (or 380536176 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 18265736208 in words is "eighteen billion, two hundred sixty-five million, seven hundred thirty-six thousand, two hundred eight".