13468526821 has 2 divisors, whose sum is σ = 13468526822. Its totient is φ = 13468526820.

The previous prime is 13468526749. The next prime is 13468526849. The reversal of 13468526821 is 12862586431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12943612900 + 524913921 = 113770^2 + 22911^2 .

It is a cyclic number.

It is not a de Polignac number, because 13468526821 - 2²⁹ = 12931655909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13468526021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6734263410 + 6734263411.

It is an arithmetic number, because the mean of its divisors is an integer number (6734263411).

Almost surely, 2^13468526821 is an apocalyptic number.

It is an amenable number.

13468526821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13468526821 is an equidigital number, since it uses as much as digits as its factorization.

13468526821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 46.

The spelling of 13468526821 in words is "thirteen billion, four hundred sixty-eight million, five hundred twenty-six thousand, eight hundred twenty-one".