20191002001911 has 24 divisors (see below), whose sum is σ = 32773800355296. Its totient is φ = 11885004521280.

The previous prime is 20191002001829. The next prime is 20191002001939. The reversal of 20191002001911 is 11910020019102.

It is not a de Polignac number, because 20191002001911 - 2¹⁵ = 20191001969143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20191002001991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3751577020 + ... + 3751582401.

It is an arithmetic number, because the mean of its divisors is an integer number (1365575014804).

Almost surely, 2^{20191002001911} is an apocalyptic number.

20191002001911 is a deficient number, since it is larger than the sum of its proper divisors (12582798353385).

20191002001911 is a wasteful number, since it uses less digits than its factorization.

20191002001911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7503159463 (or 7503159460 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 20191002001911 in words is "twenty trillion, one hundred ninety-one billion, two million, one thousand, nine hundred eleven".