13404635243 has 24 divisors (see below), whose sum is σ = 14230381056. Its totient is φ = 12616611840.

The previous prime is 13404635227. The next prime is 13404635273. The reversal of 13404635243 is 34253640431.

It is not a de Polignac number, because 13404635243 - 2⁴ = 13404635227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13404635273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7898171 + ... + 7899867.

It is an arithmetic number, because the mean of its divisors is an integer number (592932544).

Almost surely, 2^13404635243 is an apocalyptic number.

13404635243 is a deficient number, since it is larger than the sum of its proper divisors (825745813).

13404635243 is a wasteful number, since it uses less digits than its factorization.

13404635243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 13404635243 in words is "thirteen billion, four hundred four million, six hundred thirty-five thousand, two hundred forty-three".