21232413432 has 96 divisors (see below), whose sum is σ = 61426291680. Its totient is φ = 6602158080.

The previous prime is 21232413413. The next prime is 21232413443. The reversal of 21232413432 is 23431423212.

21232413432 is a `hidden beast` number, since 212 + 3 + 2 + 4 + 13 + 432 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21232413396 and 21232413405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61557 + ... + 215067.

It is an arithmetic number, because the mean of its divisors is an integer number (639857205).

Almost surely, 2^21232413432 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 21232413432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30713145840).

21232413432 is an abundant number, since it is smaller than the sum of its proper divisors (40193878248).

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

21232413432 is a wasteful number, since it uses less digits than its factorization.

21232413432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153653 (or 153646 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 21232413432 its reverse (23431423212), we get a palindrome (44663836644).

The spelling of 21232413432 in words is "twenty-one billion, two hundred thirty-two million, four hundred thirteen thousand, four hundred thirty-two".