20021333352 has 96 divisors (see below), whose sum is σ = 51385931520. Its totient is φ = 6500528640.

The previous prime is 20021333351. The next prime is 20021333359. The reversal of 20021333352 is 25333312002.

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 (20021333351) 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 23 ways as a sum of consecutive naturals, for example, 12776073 + ... + 12777639.

It is an arithmetic number, because the mean of its divisors is an integer number (535270120).

Almost surely, 2^20021333352 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 20021333352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25692965760).

20021333352 is an abundant number, since it is smaller than the sum of its proper divisors (31364598168).

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

20021333352 is a wasteful number, since it uses less digits than its factorization.

20021333352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911 (or 1860 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

Adding to 20021333352 its reverse (25333312002), we get a palindrome (45354645354).

The spelling of 20021333352 in words is "twenty billion, twenty-one million, three hundred thirty-three thousand, three hundred fifty-two".