19473933467647 has 2 divisors, whose sum is σ = 19473933467648. Its totient is φ = 19473933467646.

The previous prime is 19473933467641. The next prime is 19473933467663. The reversal of 19473933467647 is 74676433937491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19473933467647 - 2¹¹ = 19473933465599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19473933467647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19473933467641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9736966733823 + 9736966733824.

It is an arithmetic number, because the mean of its divisors is an integer number (9736966733824).

Almost surely, 2^{19473933467647} is an apocalyptic number.

19473933467647 is a deficient number, since it is larger than the sum of its proper divisors (1).

19473933467647 is an equidigital number, since it uses as much as digits as its factorization.

19473933467647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728324864, while the sum is 73.

The spelling of 19473933467647 in words is "nineteen trillion, four hundred seventy-three billion, nine hundred thirty-three million, four hundred sixty-seven thousand, six hundred forty-seven".