19604869 has 2 divisors, whose sum is σ = 19604870. Its totient is φ = 19604868.

The previous prime is 19604839. The next prime is 19604881. The reversal of 19604869 is 96840691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14152644 + 5452225 = 3762^2 + 2335^2 .

It is an emirp because it is prime and its reverse (96840691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19604869 - 2⁹ = 19604357 is a prime.

It is a super-2 number, since 2×19604869² = 768701777014322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19604839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9802434 + 9802435.

It is an arithmetic number, because the mean of its divisors is an integer number (9802435).

Almost surely, 2^19604869 is an apocalyptic number.

It is an amenable number.

19604869 is a deficient number, since it is larger than the sum of its proper divisors (1).

19604869 is an equidigital number, since it uses as much as digits as its factorization.

19604869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 19604869 is about 4427.7385875862. The cubic root of 19604869 is about 269.6422743117.

The spelling of 19604869 in words is "nineteen million, six hundred four thousand, eight hundred sixty-nine".