20324221220 has 24 divisors (see below), whose sum is σ = 42683625600. Its totient is φ = 8129162592.

The previous prime is 20324221219. The next prime is 20324221273. The reversal of 20324221220 is 2212242302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20324221192 and 20324221201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476741 + ... + 517619.

It is an arithmetic number, because the mean of its divisors is an integer number (1778484400).

Almost surely, 2^20324221220 is an apocalyptic number.

20324221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20324221220 is an abundant number, since it is smaller than the sum of its proper divisors (22359404380).

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

20324221220 is a wasteful number, since it uses less digits than its factorization.

20324221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65747 (or 65745 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20324221220 its reverse (2212242302), we get a palindrome (22536463522).

The spelling of 20324221220 in words is "twenty billion, three hundred twenty-four million, two hundred twenty-one thousand, two hundred twenty".