19534406057 has 2 divisors, whose sum is σ = 19534406058. Its totient is φ = 19534406056.

The previous prime is 19534406051. The next prime is 19534406071. The reversal of 19534406057 is 75060443591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16214456896 + 3319949161 = 127336^2 + 57619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19534406057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19534405999 and 19534406017.

It is not a weakly prime, because it can be changed into another prime (19534406051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9767203028 + 9767203029.

It is an arithmetic number, because the mean of its divisors is an integer number (9767203029).

Almost surely, 2^19534406057 is an apocalyptic number.

It is an amenable number.

19534406057 is a deficient number, since it is larger than the sum of its proper divisors (1).

19534406057 is an equidigital number, since it uses as much as digits as its factorization.

19534406057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 19534406057 in words is "nineteen billion, five hundred thirty-four million, four hundred six thousand, fifty-seven".