20192910911 has 4 divisors (see below), whose sum is σ = 20392840824. Its totient is φ = 19992981000.

The previous prime is 20192910869. The next prime is 20192910923. The reversal of 20192910911 is 11901929102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20192910911 - 2²² = 20188716607 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 (20192910971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99964805 + ... + 99965006.

It is an arithmetic number, because the mean of its divisors is an integer number (5098210206).

Almost surely, 2^20192910911 is an apocalyptic number.

20192910911 is a deficient number, since it is larger than the sum of its proper divisors (199929913).

20192910911 is a wasteful number, since it uses less digits than its factorization.

20192910911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199929912.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 20192910911 in words is "twenty billion, one hundred ninety-two million, nine hundred ten thousand, nine hundred eleven".