19787067563 has 2 divisors, whose sum is σ = 19787067564. Its totient is φ = 19787067562.

The previous prime is 19787067551. The next prime is 19787067569. The reversal of 19787067563 is 36576078791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19787067563 is a prime.

It is not a weakly prime, because it can be changed into another prime (19787067569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9893533781 + 9893533782.

It is an arithmetic number, because the mean of its divisors is an integer number (9893533782).

Almost surely, 2^19787067563 is an apocalyptic number.

19787067563 is a deficient number, since it is larger than the sum of its proper divisors (1).

19787067563 is an equidigital number, since it uses as much as digits as its factorization.

19787067563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13335840, while the sum is 59.

The spelling of 19787067563 in words is "nineteen billion, seven hundred eighty-seven million, sixty-seven thousand, five hundred sixty-three".