19160721436841 has 2 divisors, whose sum is σ = 19160721436842. Its totient is φ = 19160721436840.

The previous prime is 19160721436837. The next prime is 19160721436861. The reversal of 19160721436841 is 14863412706191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18952274403241 + 208447033600 = 4353421^2 + 456560^2 .

It is a cyclic number.

It is not a de Polignac number, because 19160721436841 - 2² = 19160721436837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19160721436861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9580360718420 + 9580360718421.

It is an arithmetic number, because the mean of its divisors is an integer number (9580360718421).

Almost surely, 2^{19160721436841} is an apocalyptic number.

It is an amenable number.

19160721436841 is a deficient number, since it is larger than the sum of its proper divisors (1).

19160721436841 is an equidigital number, since it uses as much as digits as its factorization.

19160721436841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 19160721436841 in words is "nineteen trillion, one hundred sixty billion, seven hundred twenty-one million, four hundred thirty-six thousand, eight hundred forty-one".