20021916852 has 288 divisors, whose sum is σ = 63345623040. Its totient is φ = 5442655680.

The previous prime is 20021916851. The next prime is 20021916853. The reversal of 20021916852 is 25861912002.

It is an interprime number because it is at equal distance from previous prime (20021916851) and next prime (20021916853).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021916851) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32984733 + ... + 32985339.

It is an arithmetic number, because the mean of its divisors is an integer number (219950080).

Almost surely, 2^20021916852 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 20021916852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31672811520).

20021916852 is an abundant number, since it is smaller than the sum of its proper divisors (43323706188).

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

20021916852 is a wasteful number, since it uses less digits than its factorization.

20021916852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 20021916852 in words is "twenty billion, twenty-one million, nine hundred sixteen thousand, eight hundred fifty-two".