18316806674 has 4 divisors (see below), whose sum is σ = 27475210014. Its totient is φ = 9158403336.

The previous prime is 18316806671. The next prime is 18316806733. The reversal of 18316806674 is 47660861381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13276800625 + 5040006049 = 115225^2 + 70993^2 .

It is not an unprimeable number, because it can be changed into a prime (18316806671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4579201667 + ... + 4579201670.

Almost surely, 2^18316806674 is an apocalyptic number.

18316806674 is a deficient number, since it is larger than the sum of its proper divisors (9158403340).

18316806674 is an equidigital number, since it uses as much as digits as its factorization.

18316806674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9158403339.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 18316806674 in words is "eighteen billion, three hundred sixteen million, eight hundred six thousand, six hundred seventy-four".