20001200022 has 64 divisors (see below), whose sum is σ = 46812960000. Its totient is φ = 6312587904.

The previous prime is 20001199973. The next prime is 20001200047. The reversal of 20001200022 is 22000210002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20001199977 and 20001200013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2255854 + ... + 2264702.

It is an arithmetic number, because the mean of its divisors is an integer number (731452500).

Almost surely, 2^20001200022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001200022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23406480000).

20001200022 is an abundant number, since it is smaller than the sum of its proper divisors (26811759978).

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

20001200022 is a wasteful number, since it uses less digits than its factorization.

20001200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11082 (or 11076 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20001200022 its reverse (22000210002), we get a palindrome (42001410024).

The spelling of 20001200022 in words is "twenty billion, one million, two hundred thousand, twenty-two".