19634530673 has 2 divisors, whose sum is σ = 19634530674. Its totient is φ = 19634530672.

The previous prime is 19634530627. The next prime is 19634530687. The reversal of 19634530673 is 37603543691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19505753569 + 128777104 = 139663^2 + 11348^2 .

It is a cyclic number.

It is not a de Polignac number, because 19634530673 - 2³² = 15339563377 is a prime.

It is not a weakly prime, because it can be changed into another prime (19634530693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9817265336 + 9817265337.

It is an arithmetic number, because the mean of its divisors is an integer number (9817265337).

Almost surely, 2^19634530673 is an apocalyptic number.

It is an amenable number.

19634530673 is a deficient number, since it is larger than the sum of its proper divisors (1).

19634530673 is an equidigital number, since it uses as much as digits as its factorization.

19634530673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 47.

The spelling of 19634530673 in words is "nineteen billion, six hundred thirty-four million, five hundred thirty thousand, six hundred seventy-three".