19631689339 has 2 divisors, whose sum is σ = 19631689340. Its totient is φ = 19631689338.

The previous prime is 19631689321. The next prime is 19631689361. The reversal of 19631689339 is 93398613691.

It is a weak prime.

It is an emirp because it is prime and its reverse (93398613691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19631689339 - 2¹⁷ = 19631558267 is a prime.

It is not a weakly prime, because it can be changed into another prime (19631689379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9815844669 + 9815844670.

It is an arithmetic number, because the mean of its divisors is an integer number (9815844670).

Almost surely, 2^19631689339 is an apocalyptic number.

19631689339 is a deficient number, since it is larger than the sum of its proper divisors (1).

19631689339 is an equidigital number, since it uses as much as digits as its factorization.

19631689339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 58.

The spelling of 19631689339 in words is "nineteen billion, six hundred thirty-one million, six hundred eighty-nine thousand, three hundred thirty-nine".