18185601316 has 9 divisors (see below), whose sum is σ = 31825274299. Its totient is φ = 9092665804.

The previous prime is 18185601293. The next prime is 18185601319. The reversal of 18185601316 is 61310658181.

The square root of 18185601316 is 134854.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18185601319) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 235995 + ... + 303421.

Almost surely, 2^18185601316 is an apocalyptic number.

18185601316 is the 134854-th square number.

It is an amenable number.

18185601316 is a deficient number, since it is larger than the sum of its proper divisors (13639672983).

18185601316 is an frugal number, since it uses more digits than its factorization.

18185601316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134858 (or 67429 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 18185601316 in words is "eighteen billion, one hundred eighty-five million, six hundred one thousand, three hundred sixteen".