11505033012 has 24 divisors (see below), whose sum is σ = 29285538912. Its totient is φ = 3486373600.

The previous prime is 11505032941. The next prime is 11505033017. The reversal of 11505033012 is 21033050511.

It is a self number, because there is not a number n which added to its sum of digits gives 11505033012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11505033017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43579539 + ... + 43579802.

It is an arithmetic number, because the mean of its divisors is an integer number (1220230788).

Almost surely, 2^11505033012 is an apocalyptic number.

11505033012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11505033012 is an abundant number, since it is smaller than the sum of its proper divisors (17780505900).

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

11505033012 is a wasteful number, since it uses less digits than its factorization.

11505033012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87159359 (or 87159357 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

Adding to 11505033012 its reverse (21033050511), we get a palindrome (32538083523).

The spelling of 11505033012 in words is "eleven billion, five hundred five million, thirty-three thousand, twelve".