11503145320 has 32 divisors (see below), whose sum is σ = 26513350920. Its totient is φ = 4489031680.

The previous prime is 11503145263. The next prime is 11503145341. The reversal of 11503145320 is 2354130511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9993201156 + 1509944164 = 99966^2 + 38858^2 .

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, 3505417 + ... + 3508696.

Almost surely, 2^11503145320 is an apocalyptic number.

11503145320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11503145320 is an abundant number, since it is smaller than the sum of its proper divisors (15010205600).

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

11503145320 is a wasteful number, since it uses less digits than its factorization.

11503145320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7014165 (or 7014161 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 11503145320 its reverse (2354130511), we get a palindrome (13857275831).

The spelling of 11503145320 in words is "eleven billion, five hundred three million, one hundred forty-five thousand, three hundred twenty".