19928163427 has 2 divisors, whose sum is σ = 19928163428. Its totient is φ = 19928163426.

The previous prime is 19928163403. The next prime is 19928163457. The reversal of 19928163427 is 72436182991.

It is a weak prime.

It is an emirp because it is prime and its reverse (72436182991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19928163427 - 2³¹ = 17780679779 is a prime.

It is not a weakly prime, because it can be changed into another prime (19928163457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9964081713 + 9964081714.

It is an arithmetic number, because the mean of its divisors is an integer number (9964081714).

Almost surely, 2^19928163427 is an apocalyptic number.

19928163427 is a deficient number, since it is larger than the sum of its proper divisors (1).

19928163427 is an equidigital number, since it uses as much as digits as its factorization.

19928163427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The spelling of 19928163427 in words is "nineteen billion, nine hundred twenty-eight million, one hundred sixty-three thousand, four hundred twenty-seven".