19295921 has 2 divisors, whose sum is σ = 19295922. Its totient is φ = 19295920.

The previous prime is 19295909. The next prime is 19295929. The reversal of 19295921 is 12959291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15295921 + 4000000 = 3911^2 + 2000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19295921 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 (19295929) 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, 9647960 + 9647961.

It is an arithmetic number, because the mean of its divisors is an integer number (9647961).

Almost surely, 2^19295921 is an apocalyptic number.

It is an amenable number.

19295921 is a deficient number, since it is larger than the sum of its proper divisors (1).

19295921 is an equidigital number, since it uses as much as digits as its factorization.

19295921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 38.

The square root of 19295921 is about 4392.7122600963. The cubic root of 19295921 is about 268.2183608714.

The spelling of 19295921 in words is "nineteen million, two hundred ninety-five thousand, nine hundred twenty-one".