19436243473 has 2 divisors, whose sum is σ = 19436243474. Its totient is φ = 19436243472.

The previous prime is 19436243471. The next prime is 19436243543. The reversal of 19436243473 is 37434263491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19417865104 + 18378369 = 139348^2 + 4287^2 .

It is a cyclic number.

It is not a de Polignac number, because 19436243473 - 2¹ = 19436243471 is a prime.

Together with 19436243471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19436243471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9718121736 + 9718121737.

It is an arithmetic number, because the mean of its divisors is an integer number (9718121737).

Almost surely, 2^19436243473 is an apocalyptic number.

It is an amenable number.

19436243473 is a deficient number, since it is larger than the sum of its proper divisors (1).

19436243473 is an equidigital number, since it uses as much as digits as its factorization.

19436243473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 46.

The spelling of 19436243473 in words is "nineteen billion, four hundred thirty-six million, two hundred forty-three thousand, four hundred seventy-three".