19321916461 has 2 divisors, whose sum is σ = 19321916462. Its totient is φ = 19321916460.

The previous prime is 19321916413. The next prime is 19321916473. The reversal of 19321916461 is 16461912391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19056422025 + 265494436 = 138045^2 + 16294^2 .

It is a cyclic number.

It is not a de Polignac number, because 19321916461 - 2¹¹ = 19321914413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19321956461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9660958230 + 9660958231.

It is an arithmetic number, because the mean of its divisors is an integer number (9660958231).

Almost surely, 2^19321916461 is an apocalyptic number.

It is an amenable number.

19321916461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19321916461 is an equidigital number, since it uses as much as digits as its factorization.

19321916461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The spelling of 19321916461 in words is "nineteen billion, three hundred twenty-one million, nine hundred sixteen thousand, four hundred sixty-one".