21132022432 has 48 divisors (see below), whose sum is σ = 43461556992. Its totient is φ = 10095205120.

The previous prime is 21132022427. The next prime is 21132022447. The reversal of 21132022432 is 23422023112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654738 + ... + 686254.

It is an arithmetic number, because the mean of its divisors is an integer number (905449104).

Almost surely, 2^21132022432 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 21132022432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21730778496).

21132022432 is an abundant number, since it is smaller than the sum of its proper divisors (22329534560).

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

21132022432 is a wasteful number, since it uses less digits than its factorization.

21132022432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32461 (or 32453 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21132022432 its reverse (23422023112), we get a palindrome (44554045544).

The spelling of 21132022432 in words is "twenty-one billion, one hundred thirty-two million, twenty-two thousand, four hundred thirty-two".