18673617668435 has 16 divisors (see below), whose sum is σ = 22640480414496. Its totient is φ = 14784149971968.

The previous prime is 18673617668371. The next prime is 18673617668443. The reversal of 18673617668435 is 53486671637681.

It is a cyclic number.

It is not a de Polignac number, because 18673617668435 - 2⁶ = 18673617668371 is a prime.

It is a Duffinian 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, 8914712 + ... + 10808298.

It is an arithmetic number, because the mean of its divisors is an integer number (1415030025906).

Almost surely, 2^{18673617668435} is an apocalyptic number.

18673617668435 is a deficient number, since it is larger than the sum of its proper divisors (3966862746061).

18673617668435 is a wasteful number, since it uses less digits than its factorization.

18673617668435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914022.

The product of its digits is 731566080, while the sum is 71.

The spelling of 18673617668435 in words is "eighteen trillion, six hundred seventy-three billion, six hundred seventeen million, six hundred sixty-eight thousand, four hundred thirty-five".