13440004431 has 32 divisors (see below), whose sum is σ = 21071052288. Its totient is φ = 7459102080.

The previous prime is 13440004429. The next prime is 13440004439.

13440004431 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13440004431 - 2¹ = 13440004429 is a prime.

It is a super-2 number, since 2×13440004431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440004439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 428521 + ... + 458813.

It is an arithmetic number, because the mean of its divisors is an integer number (658470384).

Almost surely, 2^13440004431 is an apocalyptic number.

13440004431 is a deficient number, since it is larger than the sum of its proper divisors (7631047857).

13440004431 is a wasteful number, since it uses less digits than its factorization.

13440004431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30911.

The product of its (nonzero) digits is 2304, while the sum is 24.

It can be divided in two parts, 1344000 and 4431, that added together give a palindrome (1348431).

The spelling of 13440004431 in words is "thirteen billion, four hundred forty million, four thousand, four hundred thirty-one".