20213220322 has 4 divisors (see below), whose sum is σ = 30319830486. Its totient is φ = 10106610160.

The previous prime is 20213220311. The next prime is 20213220323. The reversal of 20213220322 is 22302231202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19049796441 + 1163423881 = 138021^2 + 34109^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20213220322.

It is not an unprimeable number, because it can be changed into a prime (20213220323) by changing a digit.

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 as a sum of consecutive naturals, namely, 5053305079 + ... + 5053305082.

Almost surely, 2^20213220322 is an apocalyptic number.

20213220322 is a deficient number, since it is larger than the sum of its proper divisors (10106610164).

20213220322 is a wasteful number, since it uses less digits than its factorization.

20213220322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106610163.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20213220322 its reverse (22302231202), we get a palindrome (42515451524).

The spelling of 20213220322 in words is "twenty billion, two hundred thirteen million, two hundred twenty thousand, three hundred twenty-two".