19201101911 has 6 divisors (see below), whose sum is σ = 20397018600. Its totient is φ = 18071625056.

The previous prime is 19201101893. The next prime is 19201101923. The reversal of 19201101911 is 11910110291.

It is a de Polignac number, because none of the positive numbers 2^k-19201101911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19201101611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33219611 + ... + 33220188.

It is an arithmetic number, because the mean of its divisors is an integer number (3399503100).

Almost surely, 2^19201101911 is an apocalyptic number.

19201101911 is a deficient number, since it is larger than the sum of its proper divisors (1195916689).

19201101911 is an equidigital number, since it uses as much as digits as its factorization.

19201101911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66439833 (or 66439816 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 26.

The spelling of 19201101911 in words is "nineteen billion, two hundred one million, one hundred one thousand, nine hundred eleven".