19097316506 has 4 divisors (see below), whose sum is σ = 28645974762. Its totient is φ = 9548658252.

The previous prime is 19097316479. The next prime is 19097316523. The reversal of 19097316506 is 60561379091.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15270780625 + 3826535881 = 123575^2 + 61859^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4774329125 + ... + 4774329128.

Almost surely, 2^19097316506 is an apocalyptic number.

19097316506 is a deficient number, since it is larger than the sum of its proper divisors (9548658256).

19097316506 is an equidigital number, since it uses as much as digits as its factorization.

19097316506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9548658255.

The product of its (nonzero) digits is 306180, while the sum is 47.

The spelling of 19097316506 in words is "nineteen billion, ninety-seven million, three hundred sixteen thousand, five hundred six".