32021421432 has 128 divisors (see below), whose sum is σ = 107484572160. Its totient is φ = 7677457920.

The previous prime is 32021421431. The next prime is 32021421437. The reversal of 32021421432 is 23412412023.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32021421431) 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 31 ways as a sum of consecutive naturals, for example, 642423 + ... + 690470.

It is an arithmetic number, because the mean of its divisors is an integer number (839723220).

Almost surely, 2^32021421432 is an apocalyptic number.

It is an amenable number.

32021421432 is an abundant number, since it is smaller than the sum of its proper divisors (75463150728).

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

32021421432 is a wasteful number, since it uses less digits than its factorization.

32021421432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332933 (or 1332929 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 32021421432 its reverse (23412412023), we get a palindrome (55433833455).

The spelling of 32021421432 in words is "thirty-two billion, twenty-one million, four hundred twenty-one thousand, four hundred thirty-two".