18386722036 has 12 divisors (see below), whose sum is σ = 32629957920. Its totient is φ = 9063876920.

The previous prime is 18386722027. The next prime is 18386722069. The reversal of 18386722036 is 63022768381.

It is a congruent number.

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, 32370706 + ... + 32371273.

It is an arithmetic number, because the mean of its divisors is an integer number (2719163160).

Almost surely, 2^18386722036 is an apocalyptic number.

It is an amenable number.

18386722036 is a deficient number, since it is larger than the sum of its proper divisors (14243235884).

18386722036 is a wasteful number, since it uses less digits than its factorization.

18386722036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64742054 (or 64742052 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 18386722036 in words is "eighteen billion, three hundred eighty-six million, seven hundred twenty-two thousand, thirty-six".