19729732089 has 16 divisors (see below), whose sum is σ = 26412825600. Its totient is φ = 13099990416.

The previous prime is 19729732073. The next prime is 19729732103. The reversal of 19729732089 is 98023792791.

It is not a de Polignac number, because 19729732089 - 2⁴ = 19729732073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19729732049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 875242 + ... + 897500.

It is an arithmetic number, because the mean of its divisors is an integer number (1650801600).

Almost surely, 2^19729732089 is an apocalyptic number.

It is an amenable number.

19729732089 is a deficient number, since it is larger than the sum of its proper divisors (6683093511).

19729732089 is a wasteful number, since it uses less digits than its factorization.

19729732089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23444.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The spelling of 19729732089 in words is "nineteen billion, seven hundred twenty-nine million, seven hundred thirty-two thousand, eighty-nine".