11503343220 has 24 divisors (see below), whose sum is σ = 32209361184. Its totient is φ = 3067558176.

The previous prime is 11503343219. The next prime is 11503343237. The reversal of 11503343220 is 2234330511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95861134 + ... + 95861253.

It is an arithmetic number, because the mean of its divisors is an integer number (1342056716).

Almost surely, 2^11503343220 is an apocalyptic number.

11503343220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11503343220 is an abundant number, since it is smaller than the sum of its proper divisors (20706017964).

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

11503343220 is a wasteful number, since it uses less digits than its factorization.

11503343220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191722399 (or 191722397 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 11503343220 its reverse (2234330511), we get a palindrome (13737673731).

The spelling of 11503343220 in words is "eleven billion, five hundred three million, three hundred forty-three thousand, two hundred twenty".