16520188933 has 2 divisors, whose sum is σ = 16520188934. Its totient is φ = 16520188932.

The previous prime is 16520188903. The next prime is 16520188939. The reversal of 16520188933 is 33988102561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16420628449 + 99560484 = 128143^2 + 9978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16520188933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16520188939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8260094466 + 8260094467.

It is an arithmetic number, because the mean of its divisors is an integer number (8260094467).

Almost surely, 2^16520188933 is an apocalyptic number.

It is an amenable number.

16520188933 is a deficient number, since it is larger than the sum of its proper divisors (1).

16520188933 is an equidigital number, since it uses as much as digits as its factorization.

16520188933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 16520188933 in words is "sixteen billion, five hundred twenty million, one hundred eighty-eight thousand, nine hundred thirty-three".