20321222202 has 24 divisors (see below), whose sum is σ = 44063312436. Its totient is φ = 6768510336.

The previous prime is 20321222191. The next prime is 20321222261. The reversal of 20321222202 is 20222212302.

It can be written as a sum of positive squares in 2 ways, for example, as 12577398201 + 7743824001 = 112149^2 + 87999^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411873 + ... + 458564.

Almost surely, 2^20321222202 is an apocalyptic number.

20321222202 is an abundant number, since it is smaller than the sum of its proper divisors (23742090234).

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

20321222202 is a wasteful number, since it uses less digits than its factorization.

20321222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871742 (or 871739 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20321222202 its reverse (20222212302), we get a palindrome (40543434504).

The spelling of 20321222202 in words is "twenty billion, three hundred twenty-one million, two hundred twenty-two thousand, two hundred two".