20001000222 has 128 divisors (see below), whose sum is σ = 52492800000. Its totient is φ = 5641822368.

The previous prime is 20001000181. The next prime is 20001000233. The reversal of 20001000222 is 22200010002.

20001000222 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1456404 + ... + 1470072.

It is an arithmetic number, because the mean of its divisors is an integer number (410100000).

Almost surely, 2^20001000222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001000222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26246400000).

20001000222 is an abundant number, since it is smaller than the sum of its proper divisors (32491799778).

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

20001000222 is a wasteful number, since it uses less digits than its factorization.

20001000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13780 (or 13760 counting only the distinct ones).

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

Adding to 20001000222 its reverse (22200010002), we get a palindrome (42201010224).

It can be divided in two parts, 200010002 and 22, that multiplied together give a palindrome (4400220044).

The spelling of 20001000222 in words is "twenty billion, one million, two hundred twenty-two", and thus it is an aban number.