19385923 has 2 divisors, whose sum is σ = 19385924. Its totient is φ = 19385922.

The previous prime is 19385921. The next prime is 19385957. The reversal of 19385923 is 32958391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19385923 - 2¹ = 19385921 is a prime.

Together with 19385921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19385921) 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, 9692961 + 9692962.

It is an arithmetic number, because the mean of its divisors is an integer number (9692962).

Almost surely, 2^19385923 is an apocalyptic number.

19385923 is a deficient number, since it is larger than the sum of its proper divisors (1).

19385923 is an equidigital number, since it uses as much as digits as its factorization.

19385923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 19385923 is about 4402.9448100107. The cubic root of 19385923 is about 268.6347313139.

The spelling of 19385923 in words is "nineteen million, three hundred eighty-five thousand, nine hundred twenty-three".