20099576813 has 2 divisors, whose sum is σ = 20099576814. Its totient is φ = 20099576812.

The previous prime is 20099576747. The next prime is 20099576831. The reversal of 20099576813 is 31867599002.

Together with next prime (20099576831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19887204484 + 212372329 = 141022^2 + 14573^2 .

It is a cyclic number.

It is not a de Polignac number, because 20099576813 - 2¹⁶ = 20099511277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20099576863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10049788406 + 10049788407.

It is an arithmetic number, because the mean of its divisors is an integer number (10049788407).

Almost surely, 2^20099576813 is an apocalyptic number.

It is an amenable number.

20099576813 is a deficient number, since it is larger than the sum of its proper divisors (1).

20099576813 is an equidigital number, since it uses as much as digits as its factorization.

20099576813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 20099576813 in words is "twenty billion, ninety-nine million, five hundred seventy-six thousand, eight hundred thirteen".