20222021312 has 56 divisors (see below), whose sum is σ = 41506456992. Its totient is φ = 9768499200.

The previous prime is 20222021311. The next prime is 20222021327. The reversal of 20222021312 is 21312022202.

It is not an unprimeable number, because it can be changed into a prime (20222021311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232862 + ... + 307682.

It is an arithmetic number, because the mean of its divisors is an integer number (741186732).

Almost surely, 2^20222021312 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 20222021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20753228496).

20222021312 is an abundant number, since it is smaller than the sum of its proper divisors (21284435680).

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

20222021312 is a wasteful number, since it uses less digits than its factorization.

20222021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74977 (or 74967 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20222021312 its reverse (21312022202), we get a palindrome (41534043514).

The spelling of 20222021312 in words is "twenty billion, two hundred twenty-two million, twenty-one thousand, three hundred twelve".