20020000221220 has 24 divisors (see below), whose sum is σ = 43178270748984. Its totient is φ = 7791567653376.

The previous prime is 20020000221197. The next prime is 20020000221223. The reversal of 20020000221220 is 2212200002002.

It can be written as a sum of positive squares in 4 ways, for example, as 1467838863936 + 18552161357284 = 1211544^2 + 4307222^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20020000221220.

It is not an unprimeable number, because it can be changed into a prime (20020000221223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13527026437 + ... + 13527027916.

It is an arithmetic number, because the mean of its divisors is an integer number (1799094614541).

Almost surely, 2^{20020000221220} is an apocalyptic number.

20020000221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020000221220 is an abundant number, since it is smaller than the sum of its proper divisors (23158270527764).

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

20020000221220 is a wasteful number, since it uses less digits than its factorization.

20020000221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27054054399 (or 27054054397 counting only the distinct ones).

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

Adding to 20020000221220 its reverse (2212200002002), we get a palindrome (22232200223222).

The spelling of 20020000221220 in words is "twenty trillion, twenty billion, two hundred twenty-one thousand, two hundred twenty".