20021332232 has 64 divisors (see below), whose sum is σ = 43184923200. Its totient is φ = 8606269440.

The previous prime is 20021332189. The next prime is 20021332249. The reversal of 20021332232 is 23223312002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 954368 + ... + 975120.

It is an arithmetic number, because the mean of its divisors is an integer number (674764425).

Almost surely, 2^20021332232 is an apocalyptic number.

20021332232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021332232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21592461600).

20021332232 is an abundant number, since it is smaller than the sum of its proper divisors (23163590968).

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

20021332232 is a wasteful number, since it uses less digits than its factorization.

20021332232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21366 (or 21362 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20021332232 its reverse (23223312002), we get a palindrome (43244644234).

It can be divided in two parts, 20021 and 332232, that added together give a palindrome (352253).

The spelling of 20021332232 in words is "twenty billion, twenty-one million, three hundred thirty-two thousand, two hundred thirty-two".