18412318864 has 15 divisors (see below), whose sum is σ = 35674919443. Its totient is φ = 9205888048.

The previous prime is 18412318853. The next prime is 18412318933. The reversal of 18412318864 is 46881321481.

The square root of 18412318864 is 135692.

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

It is a super-2 number, since 2×18412318864² (a number of 21 digits) contains 22 as substring.

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, 525807 + ... + 559729.

Almost surely, 2^18412318864 is an apocalyptic number.

18412318864 is the 135692-nd square number.

It is an amenable number.

18412318864 is a deficient number, since it is larger than the sum of its proper divisors (17262600579).

18412318864 is an frugal number, since it uses more digits than its factorization.

18412318864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67854 (or 33925 counting only the distinct ones).

The product of its digits is 294912, while the sum is 46.

The spelling of 18412318864 in words is "eighteen billion, four hundred twelve million, three hundred eighteen thousand, eight hundred sixty-four".