20321022220 has 12 divisors (see below), whose sum is σ = 42674146704. Its totient is φ = 8128408880.

The previous prime is 20321022203. The next prime is 20321022247. The reversal of 20321022220 is 2222012302.

It is a junction number, because it is equal to n+sod(n) for n = 20321022194 and 20321022203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508025536 + ... + 508025575.

It is an arithmetic number, because the mean of its divisors is an integer number (3556178892).

Almost surely, 2^20321022220 is an apocalyptic number.

20321022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321022220 is an abundant number, since it is smaller than the sum of its proper divisors (22353124484).

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

20321022220 is a wasteful number, since it uses less digits than its factorization.

20321022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016051120 (or 1016051118 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20321022220 its reverse (2222012302), we get a palindrome (22543034522).

The spelling of 20321022220 in words is "twenty billion, three hundred twenty-one million, twenty-two thousand, two hundred twenty".