20321222200 has 192 divisors, whose sum is σ = 51264576000. Its totient is φ = 7468285440.

The previous prime is 20321222191. The next prime is 20321222261. The reversal of 20321222200 is 222212302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46289581 + ... + 46290019.

It is an arithmetic number, because the mean of its divisors is an integer number (267003000).

Almost surely, 2^20321222200 is an apocalyptic number.

20321222200 is a gapful number since it is divisible by the number (20) 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 20321222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25632288000).

20321222200 is an abundant number, since it is smaller than the sum of its proper divisors (30943353800).

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

20321222200 is a wasteful number, since it uses less digits than its factorization.

20321222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20321222200 its reverse (222212302), we get a palindrome (20543434502).

The spelling of 20321222200 in words is "twenty billion, three hundred twenty-one million, two hundred twenty-two thousand, two hundred".