20085379799 has 2 divisors, whose sum is σ = 20085379800. Its totient is φ = 20085379798.

The previous prime is 20085379771. The next prime is 20085379813. The reversal of 20085379799 is 99797358002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20085379799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20085379709) 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, 10042689899 + 10042689900.

It is an arithmetic number, because the mean of its divisors is an integer number (10042689900).

Almost surely, 2^20085379799 is an apocalyptic number.

20085379799 is a deficient number, since it is larger than the sum of its proper divisors (1).

20085379799 is an equidigital number, since it uses as much as digits as its factorization.

20085379799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8573040, while the sum is 59.

The spelling of 20085379799 in words is "twenty billion, eighty-five million, three hundred seventy-nine thousand, seven hundred ninety-nine".