19519064429 has 2 divisors, whose sum is σ = 19519064430. Its totient is φ = 19519064428.

The previous prime is 19519064417. The next prime is 19519064473. The reversal of 19519064429 is 92446091591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19407276100 + 111788329 = 139310^2 + 10573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19519064429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19519064479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9759532214 + 9759532215.

It is an arithmetic number, because the mean of its divisors is an integer number (9759532215).

Almost surely, 2^19519064429 is an apocalyptic number.

It is an amenable number.

19519064429 is a deficient number, since it is larger than the sum of its proper divisors (1).

19519064429 is an equidigital number, since it uses as much as digits as its factorization.

19519064429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 19519064429 in words is "nineteen billion, five hundred nineteen million, sixty-four thousand, four hundred twenty-nine".