20402220404220 has 96 divisors (see below), whose sum is σ = 57695308001856. Its totient is φ = 5386399488000.

The previous prime is 20402220404191. The next prime is 20402220404261. The reversal of 20402220404220 is 2240402220402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110084272 + ... + 110269448.

It is an arithmetic number, because the mean of its divisors is an integer number (600992791686).

Almost surely, 2^{20402220404220} is an apocalyptic number.

20402220404220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402220404220 is an abundant number, since it is smaller than the sum of its proper divisors (37293087597636).

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

20402220404220 is a wasteful number, since it uses less digits than its factorization.

20402220404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203471 (or 203469 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20402220404220 its reverse (2240402220402), we get a palindrome (22642622624622).

The spelling of 20402220404220 in words is "twenty trillion, four hundred two billion, two hundred twenty million, four hundred four thousand, two hundred twenty".