13429999821 has 12 divisors (see below), whose sum is σ = 20830204032. Its totient is φ = 7674285528.

The previous prime is 13429999801. The next prime is 13429999837. The reversal of 13429999821 is 12899992431.

It is not a de Polignac number, because 13429999821 - 2¹⁸ = 13429737677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13429999801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45680125 + ... + 45680418.

It is an arithmetic number, because the mean of its divisors is an integer number (1735850336).

Almost surely, 2^13429999821 is an apocalyptic number.

It is an amenable number.

13429999821 is a deficient number, since it is larger than the sum of its proper divisors (7400204211).

13429999821 is an equidigital number, since it uses as much as digits as its factorization.

13429999821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91360560 (or 91360553 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 57.

The spelling of 13429999821 in words is "thirteen billion, four hundred twenty-nine million, nine hundred ninety-nine thousand, eight hundred twenty-one".