13429044808021 has 4 divisors (see below), whose sum is σ = 13429119203500. Its totient is φ = 13428970412544.

The previous prime is 13429044807911. The next prime is 13429044808027. The reversal of 13429044808021 is 12080844092431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9453866181796 + 3975178626225 = 3074714^2 + 1993785^2 .

It is a cyclic number.

It is not a de Polignac number, because 13429044808021 - 2¹³ = 13429044799829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13429044808027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36926316 + ... + 37288213.

It is an arithmetic number, because the mean of its divisors is an integer number (3357279800875).

Almost surely, 2^{13429044808021} is an apocalyptic number.

It is an amenable number.

13429044808021 is a deficient number, since it is larger than the sum of its proper divisors (74395479).

13429044808021 is an equidigital number, since it uses as much as digits as its factorization.

13429044808021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74395478.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 13429044808021 in words is "thirteen trillion, four hundred twenty-nine billion, forty-four million, eight hundred eight thousand, twenty-one".