19738279427 has 2 divisors, whose sum is σ = 19738279428. Its totient is φ = 19738279426.

The previous prime is 19738279417. The next prime is 19738279439. The reversal of 19738279427 is 72497283791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19738279427 - 2¹⁰ = 19738278403 is a prime.

It is not a weakly prime, because it can be changed into another prime (19738279417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9869139713 + 9869139714.

It is an arithmetic number, because the mean of its divisors is an integer number (9869139714).

Almost surely, 2^19738279427 is an apocalyptic number.

19738279427 is a deficient number, since it is larger than the sum of its proper divisors (1).

19738279427 is an equidigital number, since it uses as much as digits as its factorization.

19738279427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 59.

The spelling of 19738279427 in words is "nineteen billion, seven hundred thirty-eight million, two hundred seventy-nine thousand, four hundred twenty-seven".