18123085236 has 48 divisors (see below), whose sum is σ = 42577170944. Its totient is φ = 5999658336.

The previous prime is 18123085213. The next prime is 18123085241. The reversal of 18123085236 is 63258032181.

It is a junction number, because it is equal to n+sod(n) for n = 18123085194 and 18123085203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3884241 + ... + 3888903.

Almost surely, 2^18123085236 is an apocalyptic number.

It is an amenable number.

18123085236 is an abundant number, since it is smaller than the sum of its proper divisors (24454085708).

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

18123085236 is a wasteful number, since it uses less digits than its factorization.

18123085236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6820 (or 6818 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 18123085236 in words is "eighteen billion, one hundred twenty-three million, eighty-five thousand, two hundred thirty-six".