20001222332 has 72 divisors (see below), whose sum is σ = 43458734592. Its totient is φ = 7886548800.

The previous prime is 20001222323. The next prime is 20001222341. The reversal of 20001222332 is 23322210002.

It is an interprime number because it is at equal distance from previous prime (20001222323) and next prime (20001222341).

It is a self number, because there is not a number n which added to its sum of digits gives 20001222332.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1464857 + ... + 1478447.

It is an arithmetic number, because the mean of its divisors is an integer number (603593536).

Almost surely, 2^20001222332 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 20001222332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21729367296).

20001222332 is an abundant number, since it is smaller than the sum of its proper divisors (23457512260).

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

20001222332 is a wasteful number, since it uses less digits than its factorization.

20001222332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13939 (or 13924 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20001222332 its reverse (23322210002), we get a palindrome (43323432334).

The spelling of 20001222332 in words is "twenty billion, one million, two hundred twenty-two thousand, three hundred thirty-two".