13432544523421 has 2 divisors, whose sum is σ = 13432544523422. Its totient is φ = 13432544523420.

The previous prime is 13432544523383. The next prime is 13432544523451. The reversal of 13432544523421 is 12432544523431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13428450315225 + 4094208196 = 3664485^2 + 63986^2 .

It is a cyclic number.

It is not a de Polignac number, because 13432544523421 - 2³³ = 13423954588829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13432544523451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6716272261710 + 6716272261711.

It is an arithmetic number, because the mean of its divisors is an integer number (6716272261711).

Almost surely, 2^{13432544523421} is an apocalyptic number.

It is an amenable number.

13432544523421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13432544523421 is an equidigital number, since it uses as much as digits as its factorization.

13432544523421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 43.

The spelling of 13432544523421 in words is "thirteen trillion, four hundred thirty-two billion, five hundred forty-four million, five hundred twenty-three thousand, four hundred twenty-one".