11503109328 has 40 divisors (see below), whose sum is σ = 29950368768. Its totient is φ = 3804175872.

The previous prime is 11503109309. The next prime is 11503109351. The reversal of 11503109328 is 82390130511.

It is a super-2 number, since 2×11503109328² (a number of 21 digits) contains 22 as substring.

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, 937401 + ... + 949592.

Almost surely, 2^11503109328 is an apocalyptic number.

It is an amenable number.

11503109328 is an abundant number, since it is smaller than the sum of its proper divisors (18447259440).

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

11503109328 is a wasteful number, since it uses less digits than its factorization.

11503109328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887131 (or 1887125 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

Adding to 11503109328 its reverse (82390130511), we get a palindrome (93893239839).

The spelling of 11503109328 in words is "eleven billion, five hundred three million, one hundred nine thousand, three hundred twenty-eight".