20001210220 has 24 divisors (see below), whose sum is σ = 42090249600. Its totient is φ = 7983777792.

The previous prime is 20001210191. The next prime is 20001210239. The reversal of 20001210220 is 2201210002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20001210197 and 20001210206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034325 + ... + 1053484.

It is an arithmetic number, because the mean of its divisors is an integer number (1753760400).

Almost surely, 2^20001210220 is an apocalyptic number.

20001210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001210220 is an abundant number, since it is smaller than the sum of its proper divisors (22089039380).

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

20001210220 is a wasteful number, since it uses less digits than its factorization.

20001210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088297 (or 2088295 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20001210220 its reverse (2201210002), we get a palindrome (22202420222).

The spelling of 20001210220 in words is "twenty billion, one million, two hundred ten thousand, two hundred twenty".