20105953243811 has 2 divisors, whose sum is σ = 20105953243812. Its totient is φ = 20105953243810.

The previous prime is 20105953243729. The next prime is 20105953243829. The reversal of 20105953243811 is 11834235950102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20105953243811 is a prime.

It is not a weakly prime, because it can be changed into another prime (20105953240811) 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, 10052976621905 + 10052976621906.

It is an arithmetic number, because the mean of its divisors is an integer number (10052976621906).

Almost surely, 2^{20105953243811} is an apocalyptic number.

20105953243811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20105953243811 is an equidigital number, since it uses as much as digits as its factorization.

20105953243811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 20105953243811 in words is "twenty trillion, one hundred five billion, nine hundred fifty-three million, two hundred forty-three thousand, eight hundred eleven".