19787537047 has 2 divisors, whose sum is σ = 19787537048. Its totient is φ = 19787537046.

The previous prime is 19787537041. The next prime is 19787537051. The reversal of 19787537047 is 74073578791.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (74073578791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19787537047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19787536982 and 19787537000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19787537041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9893768523 + 9893768524.

It is an arithmetic number, because the mean of its divisors is an integer number (9893768524).

Almost surely, 2^19787537047 is an apocalyptic number.

19787537047 is a deficient number, since it is larger than the sum of its proper divisors (1).

19787537047 is an equidigital number, since it uses as much as digits as its factorization.

19787537047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10372320, while the sum is 58.

The spelling of 19787537047 in words is "nineteen billion, seven hundred eighty-seven million, five hundred thirty-seven thousand, forty-seven".