21342333432 has 128 divisors (see below), whose sum is σ = 62221501440. Its totient is φ = 5974732800.

The previous prime is 21342333421. The next prime is 21342333469. The reversal of 21342333432 is 23433324312.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21342333432.

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 31 ways as a sum of consecutive naturals, for example, 1639413 + ... + 1652379.

It is an arithmetic number, because the mean of its divisors is an integer number (486105480).

Almost surely, 2^21342333432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21342333432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31110750720).

21342333432 is an abundant number, since it is smaller than the sum of its proper divisors (40879168008).

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

21342333432 is a wasteful number, since it uses less digits than its factorization.

21342333432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13181 (or 13177 counting only the distinct ones).

The product of its digits is 31104, while the sum is 30.

Adding to 21342333432 its reverse (23433324312), we get a palindrome (44775657744).

The spelling of 21342333432 in words is "twenty-one billion, three hundred forty-two million, three hundred thirty-three thousand, four hundred thirty-two".