19939165311 has 24 divisors (see below), whose sum is σ = 29584012080. Its totient is φ = 11874418560.

The previous prime is 19939165297. The next prime is 19939165327. The reversal of 19939165311 is 11356193991.

It is a happy number.

It is not a de Polignac number, because 19939165311 - 2²³ = 19930776703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19939165811) 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 in 23 ways as a sum of consecutive naturals, for example, 228526 + ... + 303483.

It is an arithmetic number, because the mean of its divisors is an integer number (1232667170).

Almost surely, 2^19939165311 is an apocalyptic number.

19939165311 is a deficient number, since it is larger than the sum of its proper divisors (9644846769).

19939165311 is a wasteful number, since it uses less digits than its factorization.

19939165311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532087 (or 532056 counting only the distinct ones).

The product of its digits is 196830, while the sum is 48.

The spelling of 19939165311 in words is "nineteen billion, nine hundred thirty-nine million, one hundred sixty-five thousand, three hundred eleven".