19729577419 has 2 divisors, whose sum is σ = 19729577420. Its totient is φ = 19729577418.

The previous prime is 19729577401. The next prime is 19729577459. The reversal of 19729577419 is 91477592791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19729577419 - 2⁷ = 19729577291 is a prime.

It is a super-2 number, since 2×19729577419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19729577459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9864788709 + 9864788710.

It is an arithmetic number, because the mean of its divisors is an integer number (9864788710).

Almost surely, 2^19729577419 is an apocalyptic number.

19729577419 is a deficient number, since it is larger than the sum of its proper divisors (1).

19729577419 is an equidigital number, since it uses as much as digits as its factorization.

19729577419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 61.

The spelling of 19729577419 in words is "nineteen billion, seven hundred twenty-nine million, five hundred seventy-seven thousand, four hundred nineteen".