19530575873 has 2 divisors, whose sum is σ = 19530575874. Its totient is φ = 19530575872.

The previous prime is 19530575839. The next prime is 19530575903. The reversal of 19530575873 is 37857503591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13898523664 + 5632052209 = 117892^2 + 75047^2 .

It is a cyclic number.

It is not a de Polignac number, because 19530575873 - 2¹² = 19530571777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19530577873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9765287936 + 9765287937.

It is an arithmetic number, because the mean of its divisors is an integer number (9765287937).

Almost surely, 2^19530575873 is an apocalyptic number.

It is an amenable number.

19530575873 is a deficient number, since it is larger than the sum of its proper divisors (1).

19530575873 is an equidigital number, since it uses as much as digits as its factorization.

19530575873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969000, while the sum is 53.

The spelling of 19530575873 in words is "nineteen billion, five hundred thirty million, five hundred seventy-five thousand, eight hundred seventy-three".