20019192919291 has 4 divisors (see below), whose sum is σ = 20019231049792. Its totient is φ = 20019154788792.

The previous prime is 20019192919283. The next prime is 20019192919303. The reversal of 20019192919291 is 19291929191002.

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 20019192919291 - 2³ = 20019192919283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20019192919241) 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, 18266571 + ... + 19331476.

It is an arithmetic number, because the mean of its divisors is an integer number (5004807762448).

Almost surely, 2^{20019192919291} is an apocalyptic number.

20019192919291 is a deficient number, since it is larger than the sum of its proper divisors (38130501).

20019192919291 is an equidigital number, since it uses as much as digits as its factorization.

20019192919291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38130500.

The product of its (nonzero) digits is 472392, while the sum is 55.

The spelling of 20019192919291 in words is "twenty trillion, nineteen billion, one hundred ninety-two million, nine hundred nineteen thousand, two hundred ninety-one".