19428199823 has 2 divisors, whose sum is σ = 19428199824. Its totient is φ = 19428199822.

The previous prime is 19428199801. The next prime is 19428199849. The reversal of 19428199823 is 32899182491.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19428199823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19428199873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714099911 + 9714099912.

It is an arithmetic number, because the mean of its divisors is an integer number (9714099912).

Almost surely, 2^19428199823 is an apocalyptic number.

19428199823 is a deficient number, since it is larger than the sum of its proper divisors (1).

19428199823 is an equidigital number, since it uses as much as digits as its factorization.

19428199823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 56.

The spelling of 19428199823 in words is "nineteen billion, four hundred twenty-eight million, one hundred ninety-nine thousand, eight hundred twenty-three".