12993145524 has 30 divisors (see below), whose sum is σ = 33966649794. Its totient is φ = 4331048400.

The previous prime is 12993145519. The next prime is 12993145553. The reversal of 12993145524 is 42554139921.

It is a happy number.

12993145524 is a `hidden beast` number, since 1 + 2 + 9 + 93 + 1 + 4 + 552 + 4 = 666.

12993145524 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8067632400 + 4925513124 = 89820^2 + 70182^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12993145524.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20050827 + ... + 20051474.

Almost surely, 2^12993145524 is an apocalyptic number.

It is an amenable number.

12993145524 is an abundant number, since it is smaller than the sum of its proper divisors (20973504270).

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

12993145524 is a wasteful number, since it uses less digits than its factorization.

12993145524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40102317 (or 40102306 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The spelling of 12993145524 in words is "twelve billion, nine hundred ninety-three million, one hundred forty-five thousand, five hundred twenty-four".