19604161 has 2 divisors, whose sum is σ = 19604162. Its totient is φ = 19604160.

The previous prime is 19604141. The next prime is 19604171. The reversal of 19604161 is 16140691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 4704561 = 3860^2 + 2169^2 .

It is a cyclic number.

It is not a de Polignac number, because 19604161 - 2¹¹ = 19602113 is a prime.

It is not a weakly prime, because it can be changed into another prime (19604131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9802080 + 9802081.

It is an arithmetic number, because the mean of its divisors is an integer number (9802081).

Almost surely, 2^19604161 is an apocalyptic number.

It is an amenable number.

19604161 is a deficient number, since it is larger than the sum of its proper divisors (1).

19604161 is an equidigital number, since it uses as much as digits as its factorization.

19604161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 19604161 is about 4427.6586363449. The cubic root of 19604161 is about 269.6390283659.

The spelling of 19604161 in words is "nineteen million, six hundred four thousand, one hundred sixty-one".