13040431040 has 112 divisors (see below), whose sum is σ = 38218579392. Its totient is φ = 4127072256.

The previous prime is 13040431037. The next prime is 13040431067. The reversal of 13040431040 is 4013404031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194789 + ... + 253028.

It is an arithmetic number, because the mean of its divisors is an integer number (341237316).

Almost surely, 2^13040431040 is an apocalyptic number.

13040431040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13040431040 is an abundant number, since it is smaller than the sum of its proper divisors (25178148352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13040431040 is a wasteful number, since it uses less digits than its factorization.

13040431040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447854 (or 447844 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 13040431040 its reverse (4013404031), we get a palindrome (17053835071).

The spelling of 13040431040 in words is "thirteen billion, forty million, four hundred thirty-one thousand, forty".