13429370021 has 4 divisors (see below), whose sum is σ = 13437276000. Its totient is φ = 13421464044.

The previous prime is 13429369991. The next prime is 13429370077. The reversal of 13429370021 is 12007392431.

13429370021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13429370021 - 2⁶ = 13429369957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13429370021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13422370021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3950441 + ... + 3953838.

It is an arithmetic number, because the mean of its divisors is an integer number (3359319000).

Almost surely, 2^13429370021 is an apocalyptic number.

It is an amenable number.

13429370021 is a deficient number, since it is larger than the sum of its proper divisors (7905979).

13429370021 is an equidigital number, since it uses as much as digits as its factorization.

13429370021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7905978.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 13429370021 in words is "thirteen billion, four hundred twenty-nine million, three hundred seventy thousand, twenty-one".