20201210220 has 48 divisors (see below), whose sum is σ = 56571042528. Its totient is φ = 5386260480.

The previous prime is 20201210213. The next prime is 20201210261. The reversal of 20201210220 is 2201210202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20201210196 and 20201210205.

It is an unprimeable number.

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, 538722 + ... + 574998.

It is an arithmetic number, because the mean of its divisors is an integer number (1178563386).

Almost surely, 2^20201210220 is an apocalyptic number.

20201210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201210220 is an abundant number, since it is smaller than the sum of its proper divisors (36369832308).

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

20201210220 is a wasteful number, since it uses less digits than its factorization.

20201210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45570 (or 45568 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20201210220 its reverse (2201210202), we get a palindrome (22402420422).

The spelling of 20201210220 in words is "twenty billion, two hundred one million, two hundred ten thousand, two hundred twenty".