20192919101 has 4 divisors (see below), whose sum is σ = 20351918592. Its totient is φ = 20033919612.

The previous prime is 20192919077. The next prime is 20192919113. The reversal of 20192919101 is 10191929102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10191929102 = 2 ⋅5095964551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20192919101 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 (20192919701) 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, 79499555 + ... + 79499808.

It is an arithmetic number, because the mean of its divisors is an integer number (5087979648).

Almost surely, 2^20192919101 is an apocalyptic number.

It is an amenable number.

20192919101 is a deficient number, since it is larger than the sum of its proper divisors (158999491).

20192919101 is a wasteful number, since it uses less digits than its factorization.

20192919101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158999490.

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

The spelling of 20192919101 in words is "twenty billion, one hundred ninety-two million, nine hundred nineteen thousand, one hundred one".