13111032440 has 48 divisors (see below), whose sum is σ = 32425437240. Its totient is φ = 4767646400.

The previous prime is 13111032421. The next prime is 13111032469. The reversal of 13111032440 is 4423011131.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1349606 + ... + 1359285.

Almost surely, 2^13111032440 is an apocalyptic number.

13111032440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111032440 is an abundant number, since it is smaller than the sum of its proper divisors (19314404800).

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

13111032440 is a wasteful number, since it uses less digits than its factorization.

13111032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708924 (or 2708909 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13111032440 its reverse (4423011131), we get a palindrome (17534043571).

The spelling of 13111032440 in words is "thirteen billion, one hundred eleven million, thirty-two thousand, four hundred forty".