19893127427 has 2 divisors, whose sum is σ = 19893127428. Its totient is φ = 19893127426.

The previous prime is 19893127411. The next prime is 19893127487. The reversal of 19893127427 is 72472139891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19893127427 - 2⁴ = 19893127411 is a prime.

It is not a weakly prime, because it can be changed into another prime (19893127487) 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, 9946563713 + 9946563714.

It is an arithmetic number, because the mean of its divisors is an integer number (9946563714).

Almost surely, 2^19893127427 is an apocalyptic number.

19893127427 is a deficient number, since it is larger than the sum of its proper divisors (1).

19893127427 is an equidigital number, since it uses as much as digits as its factorization.

19893127427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The spelling of 19893127427 in words is "nineteen billion, eight hundred ninety-three million, one hundred twenty-seven thousand, four hundred twenty-seven".