18309861194 has 8 divisors (see below), whose sum is σ = 27465661380. Its totient is φ = 9154640736.

The previous prime is 18309861161. The next prime is 18309861211. The reversal of 18309861194 is 49116890381.

It can be written as a sum of positive squares in 2 ways, for example, as 15422410969 + 2887450225 = 124187^2 + 53735^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54749 + ... + 199040.

Almost surely, 2^18309861194 is an apocalyptic number.

18309861194 is a deficient number, since it is larger than the sum of its proper divisors (9155800186).

18309861194 is a wasteful number, since it uses less digits than its factorization.

18309861194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289864.

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 18309861194 in words is "eighteen billion, three hundred nine million, eight hundred sixty-one thousand, one hundred ninety-four".