18228243368 has 8 divisors (see below), whose sum is σ = 34177956330. Its totient is φ = 9114121680.

The previous prime is 18228243331. The next prime is 18228243403. The reversal of 18228243368 is 86334282281.

It can be written as a sum of positive squares in only one way, i.e., 17736379684 + 491863684 = 133178^2 + 22178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139265203 + ... + 1139265218.

Almost surely, 2^18228243368 is an apocalyptic number.

It is an amenable number.

18228243368 is a deficient number, since it is larger than the sum of its proper divisors (15949712962).

18228243368 is a wasteful number, since it uses less digits than its factorization.

18228243368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278530427 (or 2278530423 counting only the distinct ones).

The product of its digits is 884736, while the sum is 47.

The spelling of 18228243368 in words is "eighteen billion, two hundred twenty-eight million, two hundred forty-three thousand, three hundred sixty-eight".