13478820841 has 2 divisors, whose sum is σ = 13478820842. Its totient is φ = 13478820840.

The previous prime is 13478820833. The next prime is 13478820851. The reversal of 13478820841 is 14802887431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8574760000 + 4904060841 = 92600^2 + 70029^2 .

It is a cyclic number.

It is not a de Polignac number, because 13478820841 - 2³ = 13478820833 is a prime.

It is a super-2 number, since 2×13478820841² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13478820791 and 13478820800.

It is not a weakly prime, because it can be changed into another prime (13478820851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6739410420 + 6739410421.

It is an arithmetic number, because the mean of its divisors is an integer number (6739410421).

Almost surely, 2^13478820841 is an apocalyptic number.

It is an amenable number.

13478820841 is a deficient number, since it is larger than the sum of its proper divisors (1).

13478820841 is an equidigital number, since it uses as much as digits as its factorization.

13478820841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 13478820841 in words is "thirteen billion, four hundred seventy-eight million, eight hundred twenty thousand, eight hundred forty-one".