18916200473 has 2 divisors, whose sum is σ = 18916200474. Its totient is φ = 18916200472.

The previous prime is 18916200449. The next prime is 18916200503. The reversal of 18916200473 is 37400261981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16101579664 + 2814620809 = 126892^2 + 53053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18916200473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18916200473.

It is not a weakly prime, because it can be changed into another prime (18916200673) 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 as a sum of consecutive naturals, namely, 9458100236 + 9458100237.

It is an arithmetic number, because the mean of its divisors is an integer number (9458100237).

Almost surely, 2^18916200473 is an apocalyptic number.

It is an amenable number.

18916200473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18916200473 is an equidigital number, since it uses as much as digits as its factorization.

18916200473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 18916200473 in words is "eighteen billion, nine hundred sixteen million, two hundred thousand, four hundred seventy-three".