18805311368 has 8 divisors (see below), whose sum is σ = 35259958830. Its totient is φ = 9402655680.

The previous prime is 18805311367. The next prime is 18805311401. The reversal of 18805311368 is 86311350881.

It can be written as a sum of positive squares in only one way, i.e., 10819744324 + 7985567044 = 104018^2 + 89362^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18805311367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1175331953 + ... + 1175331968.

Almost surely, 2^18805311368 is an apocalyptic number.

It is an amenable number.

18805311368 is a deficient number, since it is larger than the sum of its proper divisors (16454647462).

18805311368 is a wasteful number, since it uses less digits than its factorization.

18805311368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350663927 (or 2350663923 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 18805311368 in words is "eighteen billion, eight hundred five million, three hundred eleven thousand, three hundred sixty-eight".