11523431120 has 20 divisors (see below), whose sum is σ = 26791977540. Its totient is φ = 4609372416.

The previous prime is 11523431119. The next prime is 11523431149. The reversal of 11523431120 is 2113432511.

It can be written as a sum of positive squares in 2 ways, for example, as 6936890944 + 4586540176 = 83288^2 + 67724^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72021365 + ... + 72021524.

It is an arithmetic number, because the mean of its divisors is an integer number (1339598877).

Almost surely, 2^11523431120 is an apocalyptic number.

11523431120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11523431120 is an abundant number, since it is smaller than the sum of its proper divisors (15268546420).

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

11523431120 is a wasteful number, since it uses less digits than its factorization.

11523431120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144042902 (or 144042896 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 11523431120 its reverse (2113432511), we get a palindrome (13636863631).

The spelling of 11523431120 in words is "eleven billion, five hundred twenty-three million, four hundred thirty-one thousand, one hundred twenty".