19641373 has 2 divisors, whose sum is σ = 19641374. Its totient is φ = 19641372.

The previous prime is 19641367. The next prime is 19641449. The reversal of 19641373 is 37314691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15155449 + 4485924 = 3893^2 + 2118^2 .

It is a cyclic number.

It is not a de Polignac number, because 19641373 - 2⁹ = 19640861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19641343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9820686 + 9820687.

It is an arithmetic number, because the mean of its divisors is an integer number (9820687).

Almost surely, 2^19641373 is an apocalyptic number.

It is an amenable number.

19641373 is a deficient number, since it is larger than the sum of its proper divisors (1).

19641373 is an equidigital number, since it uses as much as digits as its factorization.

19641373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 19641373 is about 4431.8588650813. The cubic root of 19641373 is about 269.8095272987.

The spelling of 19641373 in words is "nineteen million, six hundred forty-one thousand, three hundred seventy-three".