19434969729 has 24 divisors (see below), whose sum is σ = 32087864640. Its totient is φ = 11104056288.

The previous prime is 19434969713. The next prime is 19434969731. The reversal of 19434969729 is 92796943491.

19434969729 is a `hidden beast` number, since 1 + 9 + 434 + 96 + 97 + 29 = 666.

It is not a de Polignac number, because 19434969729 - 2⁴ = 19434969713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (19434969629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 502294 + ... + 539600.

It is an arithmetic number, because the mean of its divisors is an integer number (1336994360).

Almost surely, 2^19434969729 is an apocalyptic number.

It is an amenable number.

19434969729 is a deficient number, since it is larger than the sum of its proper divisors (12652894911).

19434969729 is a wasteful number, since it uses less digits than its factorization.

19434969729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45589 (or 45586 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The spelling of 19434969729 in words is "nineteen billion, four hundred thirty-four million, nine hundred sixty-nine thousand, seven hundred twenty-nine".