19396520947 has 2 divisors, whose sum is σ = 19396520948. Its totient is φ = 19396520946.

The previous prime is 19396520939. The next prime is 19396520953. The reversal of 19396520947 is 74902569391.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19396520947 - 2³ = 19396520939 is a prime.

It is not a weakly prime, because it can be changed into another prime (19396520047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9698260473 + 9698260474.

It is an arithmetic number, because the mean of its divisors is an integer number (9698260474).

Almost surely, 2^19396520947 is an apocalyptic number.

19396520947 is a deficient number, since it is larger than the sum of its proper divisors (1).

19396520947 is an equidigital number, since it uses as much as digits as its factorization.

19396520947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 19396520947 in words is "nineteen billion, three hundred ninety-six million, five hundred twenty thousand, nine hundred forty-seven".