18297919268 has 6 divisors (see below), whose sum is σ = 32021358726. Its totient is φ = 9148959632.

The previous prime is 18297919259. The next prime is 18297919279. The reversal of 18297919268 is 86291979281.

It can be written as a sum of positive squares in only one way, i.e., 10475931904 + 7821987364 = 102352^2 + 88442^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18297919268.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2287239905 + ... + 2287239912.

It is an arithmetic number, because the mean of its divisors is an integer number (5336893121).

Almost surely, 2^18297919268 is an apocalyptic number.

It is an amenable number.

18297919268 is a deficient number, since it is larger than the sum of its proper divisors (13723439458).

18297919268 is a wasteful number, since it uses less digits than its factorization.

18297919268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574479821 (or 4574479819 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 62.

The spelling of 18297919268 in words is "eighteen billion, two hundred ninety-seven million, nine hundred nineteen thousand, two hundred sixty-eight".