20321122200 has 192 divisors, whose sum is σ = 65277964800. Its totient is φ = 5226124800.

The previous prime is 20321122189. The next prime is 20321122223. The reversal of 20321122200 is 222112302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20321122200.

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, 1870785 + ... + 1881615.

It is an arithmetic number, because the mean of its divisors is an integer number (339989400).

Almost surely, 2^20321122200 is an apocalyptic number.

20321122200 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 20321122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32638982400).

20321122200 is an abundant number, since it is smaller than the sum of its proper divisors (44956842600).

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

20321122200 is a wasteful number, since it uses less digits than its factorization.

20321122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10962 (or 10953 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20321122200 its reverse (222112302), we get a palindrome (20543234502).

The spelling of 20321122200 in words is "twenty billion, three hundred twenty-one million, one hundred twenty-two thousand, two hundred".