19597530971 has 2 divisors, whose sum is σ = 19597530972. Its totient is φ = 19597530970.

The previous prime is 19597530947. The next prime is 19597530983. The reversal of 19597530971 is 17903579591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19597530971 - 2¹⁰ = 19597529947 is a prime.

It is not a weakly prime, because it can be changed into another prime (19597530991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9798765485 + 9798765486.

It is an arithmetic number, because the mean of its divisors is an integer number (9798765486).

Almost surely, 2^19597530971 is an apocalyptic number.

19597530971 is a deficient number, since it is larger than the sum of its proper divisors (1).

19597530971 is an equidigital number, since it uses as much as digits as its factorization.

19597530971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2679075, while the sum is 56.

The spelling of 19597530971 in words is "nineteen billion, five hundred ninety-seven million, five hundred thirty thousand, nine hundred seventy-one".