19325921 has 2 divisors, whose sum is σ = 19325922. Its totient is φ = 19325920.

The previous prime is 19325903. The next prime is 19325941. The reversal of 19325921 is 12952391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 4999696 = 3785^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 19325921 - 2⁶ = 19325857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19325941) 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, 9662960 + 9662961.

It is an arithmetic number, because the mean of its divisors is an integer number (9662961).

Almost surely, 2^19325921 is an apocalyptic number.

It is an amenable number.

19325921 is a deficient number, since it is larger than the sum of its proper divisors (1).

19325921 is an equidigital number, since it uses as much as digits as its factorization.

19325921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 19325921 is about 4396.1256806420. The cubic root of 19325921 is about 268.3572915180.

The spelling of 19325921 in words is "nineteen million, three hundred twenty-five thousand, nine hundred twenty-one".