18581377686904 has 16 divisors (see below), whose sum is σ = 35185034482920. Its totient is φ = 9198701824800.

The previous prime is 18581377686899. The next prime is 18581377686923. The reversal of 18581377686904 is 40968677318581.

It is a congruent number.

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, 11498376474 + ... + 11498378089.

Almost surely, 2^{18581377686904} is an apocalyptic number.

It is an amenable number.

18581377686904 is a deficient number, since it is larger than the sum of its proper divisors (16603656796016).

18581377686904 is a wasteful number, since it uses less digits than its factorization.

18581377686904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22996754670 (or 22996754666 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 73.

The spelling of 18581377686904 in words is "eighteen trillion, five hundred eighty-one billion, three hundred seventy-seven million, six hundred eighty-six thousand, nine hundred four".