19429543657 has 8 divisors (see below), whose sum is σ = 19530501120. Its totient is φ = 19328848560.

The previous prime is 19429543603. The next prime is 19429543681. The reversal of 19429543657 is 75634592491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19429543657 - 2¹¹ = 19429541609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19429543598 and 19429543607.

It is not an unprimeable number, because it can be changed into a prime (19429541657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83782 + ... + 214192.

It is an arithmetic number, because the mean of its divisors is an integer number (2441312640).

Almost surely, 2^19429543657 is an apocalyptic number.

It is an amenable number.

19429543657 is a deficient number, since it is larger than the sum of its proper divisors (100957463).

19429543657 is a wasteful number, since it uses less digits than its factorization.

19429543657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131183.

The product of its digits is 8164800, while the sum is 55.

The spelling of 19429543657 in words is "nineteen billion, four hundred twenty-nine million, five hundred forty-three thousand, six hundred fifty-seven".