20020221220 has 48 divisors (see below), whose sum is σ = 44182974528. Its totient is φ = 7610440320.

The previous prime is 20020221211. The next prime is 20020221301. The reversal of 20020221220 is 2212202002.

It is a self number, because there is not a number n which added to its sum of digits gives 20020221220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282766 + ... + 346405.

It is an arithmetic number, because the mean of its divisors is an integer number (920478636).

Almost surely, 2^20020221220 is an apocalyptic number.

20020221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020221220 is an abundant number, since it is smaller than the sum of its proper divisors (24162753308).

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

20020221220 is a wasteful number, since it uses less digits than its factorization.

20020221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629260 (or 629258 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20020221220 its reverse (2212202002), we get a palindrome (22232423222).

The spelling of 20020221220 in words is "twenty billion, twenty million, two hundred twenty-one thousand, two hundred twenty".