18404066212 has 18 divisors (see below), whose sum is σ = 37465420902. Its totient is φ = 7887456864.

The previous prime is 18404066203. The next prime is 18404066221. The reversal of 18404066212 is 21266040481.

It is an interprime number because it is at equal distance from previous prime (18404066203) and next prime (18404066221).

It can be written as a sum of positive squares in only one way, i.e., 13908900096 + 4495166116 = 117936^2 + 67046^2 .

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 5 ways as a sum of consecutive naturals, for example, 46948953 + ... + 46949344.

Almost surely, 2^18404066212 is an apocalyptic number.

It is an amenable number.

18404066212 is an abundant number, since it is smaller than the sum of its proper divisors (19061354690).

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

18404066212 is a wasteful number, since it uses less digits than its factorization.

18404066212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93898315 (or 93898306 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 18404066212 in words is "eighteen billion, four hundred four million, sixty-six thousand, two hundred twelve".