18031665736 has 32 divisors (see below), whose sum is σ = 38750040000. Its totient is φ = 7705705536.

The previous prime is 18031665677. The next prime is 18031665737. The reversal of 18031665736 is 63756613081.

It is not an unprimeable number, because it can be changed into a prime (18031665737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441766 + ... + 480853.

It is an arithmetic number, because the mean of its divisors is an integer number (1210938750).

Almost surely, 2^18031665736 is an apocalyptic number.

It is an amenable number.

18031665736 is an abundant number, since it is smaller than the sum of its proper divisors (20718374264).

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

18031665736 is a wasteful number, since it uses less digits than its factorization.

18031665736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922981 (or 922977 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 18031665736 in words is "eighteen billion, thirty-one million, six hundred sixty-five thousand, seven hundred thirty-six".