11523144220 has 48 divisors (see below), whose sum is σ = 27665100288. Its totient is φ = 3949427520.

The previous prime is 11523144181. The next prime is 11523144251. The reversal of 11523144220 is 2244132511.

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, 445359 + ... + 470521.

It is an arithmetic number, because the mean of its divisors is an integer number (576356256).

Almost surely, 2^11523144220 is an apocalyptic number.

11523144220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11523144220 is an abundant number, since it is smaller than the sum of its proper divisors (16141956068).

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

11523144220 is a wasteful number, since it uses less digits than its factorization.

11523144220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28450 (or 28448 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 11523144220 its reverse (2244132511), we get a palindrome (13767276731).

The spelling of 11523144220 in words is "eleven billion, five hundred twenty-three million, one hundred forty-four thousand, two hundred twenty".