18685877092 has 12 divisors (see below), whose sum is σ = 32743260396. Its totient is φ = 9330659840.

The previous prime is 18685877071. The next prime is 18685877117. The reversal of 18685877092 is 29077858681.

It can be written as a sum of positive squares in 2 ways, for example, as 2583282276 + 16102594816 = 50826^2 + 126896^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18685877092.

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, 3066253 + ... + 3072340.

It is an arithmetic number, because the mean of its divisors is an integer number (2728605033).

Almost surely, 2^18685877092 is an apocalyptic number.

It is an amenable number.

18685877092 is a deficient number, since it is larger than the sum of its proper divisors (14057383304).

18685877092 is a wasteful number, since it uses less digits than its factorization.

18685877092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6139358 (or 6139356 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 61.

The spelling of 18685877092 in words is "eighteen billion, six hundred eighty-five million, eight hundred seventy-seven thousand, ninety-two".