20200111969949 has 2 divisors, whose sum is σ = 20200111969950. Its totient is φ = 20200111969948.

The previous prime is 20200111969871. The next prime is 20200111969993. The reversal of 20200111969949 is 94996911100202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14534012522500 + 5666099447449 = 3812350^2 + 2380357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20200111969949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20200111969949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200111969049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100055984974 + 10100055984975.

It is an arithmetic number, because the mean of its divisors is an integer number (10100055984975).

Almost surely, 2^{20200111969949} is an apocalyptic number.

It is an amenable number.

20200111969949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200111969949 is an equidigital number, since it uses as much as digits as its factorization.

20200111969949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 53.

The spelling of 20200111969949 in words is "twenty trillion, two hundred billion, one hundred eleven million, nine hundred sixty-nine thousand, nine hundred forty-nine".