23191665473 has 2 divisors, whose sum is σ = 23191665474. Its totient is φ = 23191665472.

The previous prime is 23191665467. The next prime is 23191665481. The reversal of 23191665473 is 37456619132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21630467329 + 1561198144 = 147073^2 + 39512^2 .

It is a cyclic number.

It is not a de Polignac number, because 23191665473 - 2¹⁰ = 23191664449 is a prime.

It is not a weakly prime, because it can be changed into another prime (23191665403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11595832736 + 11595832737.

It is an arithmetic number, because the mean of its divisors is an integer number (11595832737).

Almost surely, 2^23191665473 is an apocalyptic number.

It is an amenable number.

23191665473 is a deficient number, since it is larger than the sum of its proper divisors (1).

23191665473 is an equidigital number, since it uses as much as digits as its factorization.

23191665473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 47.

The spelling of 23191665473 in words is "twenty-three billion, one hundred ninety-one million, six hundred sixty-five thousand, four hundred seventy-three".