18685367016667 has 16 divisors (see below), whose sum is σ = 20147588052480. Its totient is φ = 17226703926432.

The previous prime is 18685367016649. The next prime is 18685367016671. The reversal of 18685367016667 is 76661076358681.

It is a de Polignac number, because none of the positive numbers 2^k-18685367016667 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18685367016596 and 18685367016605.

It is not an unprimeable number, because it can be changed into a prime (18685367016467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177357468 + ... + 177462790.

It is an arithmetic number, because the mean of its divisors is an integer number (1259224253280).

Almost surely, 2^{18685367016667} is an apocalyptic number.

18685367016667 is a deficient number, since it is larger than the sum of its proper divisors (1462221035813).

18685367016667 is a wasteful number, since it uses less digits than its factorization.

18685367016667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122082.

The product of its (nonzero) digits is 365783040, while the sum is 70.

The spelling of 18685367016667 in words is "eighteen trillion, six hundred eighty-five billion, three hundred sixty-seven million, sixteen thousand, six hundred sixty-seven".