19266794491871 has 4 divisors (see below), whose sum is σ = 20400135344352. Its totient is φ = 18133453639392.

The previous prime is 19266794491849. The next prime is 19266794491933. The reversal of 19266794491871 is 17819449766291.

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 19266794491871 - 2⁶ = 19266794491807 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 (19266794491171) 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, 566670426215 + ... + 566670426248.

It is an arithmetic number, because the mean of its divisors is an integer number (5100033836088).

Almost surely, 2^{19266794491871} is an apocalyptic number.

19266794491871 is a deficient number, since it is larger than the sum of its proper divisors (1133340852481).

19266794491871 is a wasteful number, since it uses less digits than its factorization.

19266794491871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133340852480.

The product of its digits is 329204736, while the sum is 74.

The spelling of 19266794491871 in words is "nineteen trillion, two hundred sixty-six billion, seven hundred ninety-four million, four hundred ninety-one thousand, eight hundred seventy-one".