12000021432 has 32 divisors (see below), whose sum is σ = 34285776000. Its totient is φ = 3428577504.

The previous prime is 12000021419. The next prime is 12000021433. The reversal of 12000021432 is 23412000021.

12000021432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000021433) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 35714182 + ... + 35714517.

It is an arithmetic number, because the mean of its divisors is an integer number (1071430500).

Almost surely, 2^12000021432 is an apocalyptic number.

12000021432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12000021432 is an abundant number, since it is smaller than the sum of its proper divisors (22285754568).

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

12000021432 is a wasteful number, since it uses less digits than its factorization.

12000021432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71428715 (or 71428711 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12000021432 its reverse (23412000021), we get a palindrome (35412021453).

The spelling of 12000021432 in words is "twelve billion, twenty-one thousand, four hundred thirty-two".