18694068613 has 16 divisors (see below), whose sum is σ = 20968157952. Its totient is φ = 16518816000.

The previous prime is 18694068599. The next prime is 18694068623. The reversal of 18694068613 is 31686049681.

It is a cyclic number.

It is not a de Polignac number, because 18694068613 - 2²⁵ = 18660514181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18694068623) 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, 45745 + ... + 198697.

It is an arithmetic number, because the mean of its divisors is an integer number (1310509872).

Almost surely, 2^18694068613 is an apocalyptic number.

It is an amenable number.

18694068613 is a deficient number, since it is larger than the sum of its proper divisors (2274089339).

18694068613 is a wasteful number, since it uses less digits than its factorization.

18694068613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153276.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 18694068613 in words is "eighteen billion, six hundred ninety-four million, sixty-eight thousand, six hundred thirteen".