11001431320 has 96 divisors (see below), whose sum is σ = 27841358160. Its totient is φ = 3907411200.

The previous prime is 11001431303. The next prime is 11001431333. The reversal of 11001431320 is 2313410011.

It is a junction number, because it is equal to n+sod(n) for n = 11001431294 and 11001431303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181690 + ... + 234550.

Almost surely, 2^11001431320 is an apocalyptic number.

11001431320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11001431320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13920679080).

11001431320 is an abundant number, since it is smaller than the sum of its proper divisors (16839926840).

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

11001431320 is a wasteful number, since it uses less digits than its factorization.

11001431320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52937 (or 52922 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11001431320 its reverse (2313410011), we get a palindrome (13314841331).

The spelling of 11001431320 in words is "eleven billion, one million, four hundred thirty-one thousand, three hundred twenty".