18166430312 has 8 divisors (see below), whose sum is σ = 34062056850. Its totient is φ = 9083215152.

The previous prime is 18166430291. The next prime is 18166430327. The reversal of 18166430312 is 21303466181.

It can be written as a sum of positive squares in only one way, i.e., 14831829796 + 3334600516 = 121786^2 + 57746^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1135401887 + ... + 1135401902.

Almost surely, 2^18166430312 is an apocalyptic number.

It is an amenable number.

18166430312 is a deficient number, since it is larger than the sum of its proper divisors (15895626538).

18166430312 is a wasteful number, since it uses less digits than its factorization.

18166430312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270803795 (or 2270803791 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

Adding to 18166430312 its reverse (21303466181), we get a palindrome (39469896493).

The spelling of 18166430312 in words is "eighteen billion, one hundred sixty-six million, four hundred thirty thousand, three hundred twelve".