18172718348 has 6 divisors (see below), whose sum is σ = 31802257116. Its totient is φ = 9086359172.

The previous prime is 18172718341. The next prime is 18172718357. The reversal of 18172718348 is 84381727181.

It is a junction number, because it is equal to n+sod(n) for n = 18172718296 and 18172718305.

It is not an unprimeable number, because it can be changed into a prime (18172718341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2271589790 + ... + 2271589797.

It is an arithmetic number, because the mean of its divisors is an integer number (5300376186).

Almost surely, 2^18172718348 is an apocalyptic number.

It is an amenable number.

18172718348 is a deficient number, since it is larger than the sum of its proper divisors (13629538768).

18172718348 is a wasteful number, since it uses less digits than its factorization.

18172718348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543179591 (or 4543179589 counting only the distinct ones).

The product of its digits is 602112, while the sum is 50.

The spelling of 18172718348 in words is "eighteen billion, one hundred seventy-two million, seven hundred eighteen thousand, three hundred forty-eight".