18686343532 has 6 divisors (see below), whose sum is σ = 32701101188. Its totient is φ = 9343171764.

The previous prime is 18686343523. The next prime is 18686343551. The reversal of 18686343532 is 23534368681.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2335792938 + ... + 2335792945.

Almost surely, 2^18686343532 is an apocalyptic number.

It is an amenable number.

18686343532 is a deficient number, since it is larger than the sum of its proper divisors (14014757656).

18686343532 is a wasteful number, since it uses less digits than its factorization.

18686343532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671585887 (or 4671585885 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

The spelling of 18686343532 in words is "eighteen billion, six hundred eighty-six million, three hundred forty-three thousand, five hundred thirty-two".