19536641 has 2 divisors, whose sum is σ = 19536642. Its totient is φ = 19536640.

The previous prime is 19536619. The next prime is 19536659. The reversal of 19536641 is 14663591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10863616 + 8673025 = 3296^2 + 2945^2 .

It is an emirp because it is prime and its reverse (14663591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19536641 - 2¹⁰ = 19535617 is a prime.

It is not a weakly prime, because it can be changed into another prime (19526641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9768320 + 9768321.

It is an arithmetic number, because the mean of its divisors is an integer number (9768321).

Almost surely, 2^19536641 is an apocalyptic number.

It is an amenable number.

19536641 is a deficient number, since it is larger than the sum of its proper divisors (1).

19536641 is an equidigital number, since it uses as much as digits as its factorization.

19536641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 19536641 is about 4420.0272623594. The cubic root of 19536641 is about 269.3291116971.

The spelling of 19536641 in words is "nineteen million, five hundred thirty-six thousand, six hundred forty-one".