19429541609 has 2 divisors, whose sum is σ = 19429541610. Its totient is φ = 19429541608.

The previous prime is 19429541603. The next prime is 19429541627. The reversal of 19429541609 is 90614592491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18394954384 + 1034587225 = 135628^2 + 32165^2 .

It is a cyclic number.

It is not a de Polignac number, because 19429541609 - 2¹² = 19429537513 is a prime.

It is not a weakly prime, because it can be changed into another prime (19429541603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714770804 + 9714770805.

It is an arithmetic number, because the mean of its divisors is an integer number (9714770805).

Almost surely, 2^19429541609 is an apocalyptic number.

It is an amenable number.

19429541609 is a deficient number, since it is larger than the sum of its proper divisors (1).

19429541609 is an equidigital number, since it uses as much as digits as its factorization.

19429541609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 19429541609 in words is "nineteen billion, four hundred twenty-nine million, five hundred forty-one thousand, six hundred nine".