2019999911 has 2 divisors, whose sum is σ = 2019999912. Its totient is φ = 2019999910.

The previous prime is 2019999907. The next prime is 2020000039. The reversal of 2019999911 is 1199999102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2019999911 - 2² = 2019999907 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 2019999911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2019999011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009999955 + 1009999956.

It is an arithmetic number, because the mean of its divisors is an integer number (1009999956).

Almost surely, 2^2019999911 is an apocalyptic number.

2019999911 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019999911 is an equidigital number, since it uses as much as digits as its factorization.

2019999911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 50.

The square root of 2019999911 is about 44944.4091183764. The cubic root of 2019999911 is about 1264.1068462980.

The spelling of 2019999911 in words is "two billion, nineteen million, nine hundred ninety-nine thousand, nine hundred eleven".