19204594609 has 2 divisors, whose sum is σ = 19204594610. Its totient is φ = 19204594608.

The previous prime is 19204594583. The next prime is 19204594613. The reversal of 19204594609 is 90649540291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14013824400 + 5190770209 = 118380^2 + 72047^2 .

It is a cyclic number.

It is not a de Polignac number, because 19204594609 - 2¹³ = 19204586417 is a prime.

It is not a weakly prime, because it can be changed into another prime (19204594639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9602297304 + 9602297305.

It is an arithmetic number, because the mean of its divisors is an integer number (9602297305).

Almost surely, 2^19204594609 is an apocalyptic number.

It is an amenable number.

19204594609 is a deficient number, since it is larger than the sum of its proper divisors (1).

19204594609 is an equidigital number, since it uses as much as digits as its factorization.

19204594609 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 49.

The spelling of 19204594609 in words is "nineteen billion, two hundred four million, five hundred ninety-four thousand, six hundred nine".