19338542539 has 2 divisors, whose sum is σ = 19338542540. Its totient is φ = 19338542538.

The previous prime is 19338542527. The next prime is 19338542557. The reversal of 19338542539 is 93524583391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19338542539 - 2⁷ = 19338542411 is a prime.

It is not a weakly prime, because it can be changed into another prime (19338542579) 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, 9669271269 + 9669271270.

It is an arithmetic number, because the mean of its divisors is an integer number (9669271270).

Almost surely, 2^19338542539 is an apocalyptic number.

19338542539 is a deficient number, since it is larger than the sum of its proper divisors (1).

19338542539 is an equidigital number, since it uses as much as digits as its factorization.

19338542539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 52.

The spelling of 19338542539 in words is "nineteen billion, three hundred thirty-eight million, five hundred forty-two thousand, five hundred thirty-nine".