18065905412 has 12 divisors (see below), whose sum is σ = 32060621376. Its totient is φ = 8905727880.

The previous prime is 18065905411. The next prime is 18065905421. The reversal of 18065905412 is 21450956081.

It is a self number, because there is not a number n which added to its sum of digits gives 18065905412.

It is not an unprimeable number, because it can be changed into a prime (18065905411) by changing a digit.

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, 31805888 + ... + 31806455.

It is an arithmetic number, because the mean of its divisors is an integer number (2671718448).

Almost surely, 2^18065905412 is an apocalyptic number.

It is an amenable number.

18065905412 is a deficient number, since it is larger than the sum of its proper divisors (13994715964).

18065905412 is a wasteful number, since it uses less digits than its factorization.

18065905412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63612418 (or 63612416 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 18065905412 in words is "eighteen billion, sixty-five million, nine hundred five thousand, four hundred twelve".