18856322768 has 10 divisors (see below), whose sum is σ = 36534125394. Its totient is φ = 9428161376.

The previous prime is 18856322761. The next prime is 18856322777. The reversal of 18856322768 is 86722365881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13771491904 + 5084830864 = 117352^2 + 71308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18856322761) 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, 589260071 + ... + 589260102.

Almost surely, 2^18856322768 is an apocalyptic number.

It is an amenable number.

18856322768 is a deficient number, since it is larger than the sum of its proper divisors (17677802626).

18856322768 is a wasteful number, since it uses less digits than its factorization.

18856322768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178520181 (or 1178520175 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 56.

The spelling of 18856322768 in words is "eighteen billion, eight hundred fifty-six million, three hundred twenty-two thousand, seven hundred sixty-eight".