18694604968 has 16 divisors (see below), whose sum is σ = 37748721780. Its totient is φ = 8628279168.

The previous prime is 18694604947. The next prime is 18694604977. The reversal of 18694604968 is 86940649681.

It can be written as a sum of positive squares in 2 ways, for example, as 17737445124 + 957159844 = 133182^2 + 30938^2 .

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, 89877805 + ... + 89878012.

Almost surely, 2^18694604968 is an apocalyptic number.

It is an amenable number.

18694604968 is an abundant number, since it is smaller than the sum of its proper divisors (19054116812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18694604968 is a wasteful number, since it uses less digits than its factorization.

18694604968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179755836 (or 179755832 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 18694604968 in words is "eighteen billion, six hundred ninety-four million, six hundred four thousand, nine hundred sixty-eight".