18347864872 has 16 divisors (see below), whose sum is σ = 34886786400. Its totient is φ = 9044721840.

The previous prime is 18347864867. The next prime is 18347864923. The reversal of 18347864872 is 27846874381.

It is a super-2 number, since 2×18347864872² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16150722 + ... + 16151857.

It is an arithmetic number, because the mean of its divisors is an integer number (2180424150).

Almost surely, 2^18347864872 is an apocalyptic number.

It is an amenable number.

18347864872 is a deficient number, since it is larger than the sum of its proper divisors (16538921528).

18347864872 is a wasteful number, since it uses less digits than its factorization.

18347864872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32302656 (or 32302652 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 58.

The spelling of 18347864872 in words is "eighteen billion, three hundred forty-seven million, eight hundred sixty-four thousand, eight hundred seventy-two".