18673613532388 has 6 divisors (see below), whose sum is σ = 32678823681686. Its totient is φ = 9336806766192.

The previous prime is 18673613532349. The next prime is 18673613532419. The reversal of 18673613532388 is 88323531637681.

It can be written as a sum of positive squares in only one way, i.e., 18453279049984 + 220334482404 = 4295728^2 + 469398^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2334201691545 + ... + 2334201691552.

Almost surely, 2^{18673613532388} is an apocalyptic number.

It is an amenable number.

18673613532388 is a deficient number, since it is larger than the sum of its proper divisors (14005210149298).

18673613532388 is a wasteful number, since it uses less digits than its factorization.

18673613532388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668403383101 (or 4668403383099 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 64.

The spelling of 18673613532388 in words is "eighteen trillion, six hundred seventy-three billion, six hundred thirteen million, five hundred thirty-two thousand, three hundred eighty-eight".