19455020567 has 2 divisors, whose sum is σ = 19455020568. Its totient is φ = 19455020566.

The previous prime is 19455020551. The next prime is 19455020573. The reversal of 19455020567 is 76502055491.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (76502055491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19455020567 - 2⁴ = 19455020551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19455020537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9727510283 + 9727510284.

It is an arithmetic number, because the mean of its divisors is an integer number (9727510284).

Almost surely, 2^19455020567 is an apocalyptic number.

19455020567 is a deficient number, since it is larger than the sum of its proper divisors (1).

19455020567 is an equidigital number, since it uses as much as digits as its factorization.

19455020567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 19455020567 in words is "nineteen billion, four hundred fifty-five million, twenty thousand, five hundred sixty-seven".