18386722056 has 16 divisors (see below), whose sum is σ = 45966805200. Its totient is φ = 6128907344.

The previous prime is 18386722027. The next prime is 18386722069. The reversal of 18386722056 is 65022768381.

It is a junction number, because it is equal to n+sod(n) for n = 18386721996 and 18386722014.

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 3 ways as a sum of consecutive naturals, for example, 383056686 + ... + 383056733.

It is an arithmetic number, because the mean of its divisors is an integer number (2872925325).

Almost surely, 2^18386722056 is an apocalyptic number.

It is an amenable number.

18386722056 is an abundant number, since it is smaller than the sum of its proper divisors (27580083144).

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

18386722056 is a wasteful number, since it uses less digits than its factorization.

18386722056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766113428 (or 766113424 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 18386722056 in words is "eighteen billion, three hundred eighty-six million, seven hundred twenty-two thousand, fifty-six".