20413221220 has 48 divisors (see below), whose sum is σ = 50681111040. Its totient is φ = 6757478784.

The previous prime is 20413221209. The next prime is 20413221229. The reversal of 20413221220 is 2212231402.

It is not an unprimeable number, because it can be changed into a prime (20413221229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2509884 + ... + 2518003.

It is an arithmetic number, because the mean of its divisors is an integer number (1055856480).

Almost surely, 2^20413221220 is an apocalyptic number.

20413221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20413221220 is an abundant number, since it is smaller than the sum of its proper divisors (30267889820).

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

20413221220 is a wasteful number, since it uses less digits than its factorization.

20413221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027932 (or 5027930 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20413221220 its reverse (2212231402), we get a palindrome (22625452622).

The spelling of 20413221220 in words is "twenty billion, four hundred thirteen million, two hundred twenty-one thousand, two hundred twenty".