13320640732 has 48 divisors (see below), whose sum is σ = 27413007552. Its totient is φ = 5545612800.

The previous prime is 13320640709. The next prime is 13320640741. The reversal of 13320640732 is 23704602331.

It is a super-2 number, since 2×13320640732² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13320640694 and 13320640703.

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 15 ways as a sum of consecutive naturals, for example, 105448 + ... + 194320.

It is an arithmetic number, because the mean of its divisors is an integer number (571104324).

Almost surely, 2^13320640732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13320640732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13706503776).

13320640732 is an abundant number, since it is smaller than the sum of its proper divisors (14092366820).

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

13320640732 is a wasteful number, since it uses less digits than its factorization.

13320640732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89038 (or 89036 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 31.

The spelling of 13320640732 in words is "thirteen billion, three hundred twenty million, six hundred forty thousand, seven hundred thirty-two".