19429541657 has 2 divisors, whose sum is σ = 19429541658. Its totient is φ = 19429541656.

The previous prime is 19429541627. The next prime is 19429541671. The reversal of 19429541657 is 75614592491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11921145856 + 7508395801 = 109184^2 + 86651^2 .

It is a cyclic number.

It is not a de Polignac number, because 19429541657 - 2³² = 15134574361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19429541599 and 19429541608.

It is not a weakly prime, because it can be changed into another prime (19429541627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714770828 + 9714770829.

It is an arithmetic number, because the mean of its divisors is an integer number (9714770829).

Almost surely, 2^19429541657 is an apocalyptic number.

It is an amenable number.

19429541657 is a deficient number, since it is larger than the sum of its proper divisors (1).

19429541657 is an equidigital number, since it uses as much as digits as its factorization.

19429541657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 53.

The spelling of 19429541657 in words is "nineteen billion, four hundred twenty-nine million, five hundred forty-one thousand, six hundred fifty-seven".