20000985505379 has 2 divisors, whose sum is σ = 20000985505380. Its totient is φ = 20000985505378.

The previous prime is 20000985505339. The next prime is 20000985505387. The reversal of 20000985505379 is 97350558900002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20000985505379 - 2¹⁶ = 20000985439843 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20000985505379.

It is not a weakly prime, because it can be changed into another prime (20000985505339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000492752689 + 10000492752690.

It is an arithmetic number, because the mean of its divisors is an integer number (10000492752690).

Almost surely, 2^{20000985505379} is an apocalyptic number.

20000985505379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000985505379 is an equidigital number, since it uses as much as digits as its factorization.

20000985505379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402000, while the sum is 53.

The spelling of 20000985505379 in words is "twenty trillion, nine hundred eighty-five million, five hundred five thousand, three hundred seventy-nine".