20321320222 has 16 divisors (see below), whose sum is σ = 34849842912. Its totient is φ = 8705813760.

The previous prime is 20321320199. The next prime is 20321320223. The reversal of 20321320222 is 22202312302.

It is a super-2 number, since 2×20321320222² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20321320222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321320223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238779 + ... + 312502.

It is an arithmetic number, because the mean of its divisors is an integer number (2178115182).

Almost surely, 2^20321320222 is an apocalyptic number.

20321320222 is a deficient number, since it is larger than the sum of its proper divisors (14528522690).

20321320222 is a wasteful number, since it uses less digits than its factorization.

20321320222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553923.

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

Adding to 20321320222 its reverse (22202312302), we get a palindrome (42523632524).

The spelling of 20321320222 in words is "twenty billion, three hundred twenty-one million, three hundred twenty thousand, two hundred twenty-two".