18267684964 has 9 divisors (see below), whose sum is σ = 31968921747. Its totient is φ = 9133707324.

The previous prime is 18267684947. The next prime is 18267684971. The reversal of 18267684964 is 46948676281.

The square root of 18267684964 is 135158.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 236527 + ... + 304105.

Almost surely, 2^18267684964 is an apocalyptic number.

18267684964 is the 135158-th square number.

It is an amenable number.

18267684964 is a deficient number, since it is larger than the sum of its proper divisors (13701236783).

18267684964 is an frugal number, since it uses more digits than its factorization.

18267684964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135162 (or 67581 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 61.

The spelling of 18267684964 in words is "eighteen billion, two hundred sixty-seven million, six hundred eighty-four thousand, nine hundred sixty-four".