12005521432 has 16 divisors (see below), whose sum is σ = 22551969600. Its totient is φ = 5991662880.

The previous prime is 12005521369. The next prime is 12005521433. The reversal of 12005521432 is 23412550021.

It is a super-2 number, since 2×12005521432² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12005521397 and 12005521406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12005521433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382632 + ... + 1391287.

It is an arithmetic number, because the mean of its divisors is an integer number (1409498100).

Almost surely, 2^12005521432 is an apocalyptic number.

It is an amenable number.

12005521432 is a deficient number, since it is larger than the sum of its proper divisors (10546448168).

12005521432 is a wasteful number, since it uses less digits than its factorization.

12005521432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774466 (or 2774462 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 12005521432 in words is "twelve billion, five million, five hundred twenty-one thousand, four hundred thirty-two".