19754474647 has 2 divisors, whose sum is σ = 19754474648. Its totient is φ = 19754474646.

The previous prime is 19754474617. The next prime is 19754474651. The reversal of 19754474647 is 74647445791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19754474647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19754474591 and 19754474600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19754474617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9877237323 + 9877237324.

It is an arithmetic number, because the mean of its divisors is an integer number (9877237324).

Almost surely, 2^19754474647 is an apocalyptic number.

19754474647 is a deficient number, since it is larger than the sum of its proper divisors (1).

19754474647 is an equidigital number, since it uses as much as digits as its factorization.

19754474647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 58.

The spelling of 19754474647 in words is "nineteen billion, seven hundred fifty-four million, four hundred seventy-four thousand, six hundred forty-seven".