19530380543 has 2 divisors, whose sum is σ = 19530380544. Its totient is φ = 19530380542.

The previous prime is 19530380473. The next prime is 19530380549. The reversal of 19530380543 is 34508303591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19530380543 - 2¹⁴ = 19530364159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19530380543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19530380549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9765190271 + 9765190272.

It is an arithmetic number, because the mean of its divisors is an integer number (9765190272).

Almost surely, 2^19530380543 is an apocalyptic number.

19530380543 is a deficient number, since it is larger than the sum of its proper divisors (1).

19530380543 is an equidigital number, since it uses as much as digits as its factorization.

19530380543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 19530380543 in words is "nineteen billion, five hundred thirty million, three hundred eighty thousand, five hundred forty-three".