18183573172 has 6 divisors (see below), whose sum is σ = 31821253058. Its totient is φ = 9091786584.

The previous prime is 18183573157. The next prime is 18183573193. The reversal of 18183573172 is 27137538181.

It can be written as a sum of positive squares in only one way, i.e., 10711008036 + 7472565136 = 103494^2 + 86444^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2272946643 + ... + 2272946650.

Almost surely, 2^18183573172 is an apocalyptic number.

It is an amenable number.

18183573172 is a deficient number, since it is larger than the sum of its proper divisors (13637679886).

18183573172 is a wasteful number, since it uses less digits than its factorization.

18183573172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545893297 (or 4545893295 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The spelling of 18183573172 in words is "eighteen billion, one hundred eighty-three million, five hundred seventy-three thousand, one hundred seventy-two".