18247670856 has 24 divisors (see below), whose sum is σ = 49420775430. Its totient is φ = 6082556928.

The previous prime is 18247670827. The next prime is 18247670897. The reversal of 18247670856 is 65807674281.

It can be written as a sum of positive squares in only one way, i.e., 15935022756 + 2312648100 = 126234^2 + 48090^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 in 5 ways as a sum of consecutive naturals, for example, 126719865 + ... + 126720008.

Almost surely, 2^18247670856 is an apocalyptic number.

It is an amenable number.

18247670856 is an abundant number, since it is smaller than the sum of its proper divisors (31173104574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18247670856 is a wasteful number, since it uses less digits than its factorization.

18247670856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253439885 (or 253439878 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 18247670856 in words is "eighteen billion, two hundred forty-seven million, six hundred seventy thousand, eight hundred fifty-six".