18809344468 has 6 divisors (see below), whose sum is σ = 32916352826. Its totient is φ = 9404672232.

The previous prime is 18809344453. The next prime is 18809344507. The reversal of 18809344468 is 86444390881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18667210384 + 142134084 = 136628^2 + 11922^2 .

It is a congruent number.

It is an unprimeable number.

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, 2351168055 + ... + 2351168062.

Almost surely, 2^18809344468 is an apocalyptic number.

It is an amenable number.

18809344468 is a deficient number, since it is larger than the sum of its proper divisors (14107008358).

18809344468 is a wasteful number, since it uses less digits than its factorization.

18809344468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702336121 (or 4702336119 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 55.

The spelling of 18809344468 in words is "eighteen billion, eight hundred nine million, three hundred forty-four thousand, four hundred sixty-eight".