18685005005 has 16 divisors (see below), whose sum is σ = 22781533824. Its totient is φ = 14710171200.

The previous prime is 18685004969. The next prime is 18685005011. The reversal of 18685005005 is 50050058681.

It is not a de Polignac number, because 18685005005 - 2²⁰ = 18683956429 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 18685005005.

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, 34862 + ... + 196431.

It is an arithmetic number, because the mean of its divisors is an integer number (1423845864).

Almost surely, 2^18685005005 is an apocalyptic number.

It is an amenable number.

18685005005 is a deficient number, since it is larger than the sum of its proper divisors (4096528819).

18685005005 is a wasteful number, since it uses less digits than its factorization.

18685005005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231556.

The product of its (nonzero) digits is 48000, while the sum is 38.

The spelling of 18685005005 in words is "eighteen billion, six hundred eighty-five million, five thousand, five".