20001200220020 has 24 divisors (see below), whose sum is σ = 42395067386784. Its totient is φ = 7925709245216.

The previous prime is 20001200220013. The next prime is 20001200220041. The reversal of 20001200220020 is 2002200210002.

It is a junction number, because it is equal to n+sod(n) for n = 20001200219983 and 20001200220010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4673175482 + ... + 4673179761.

It is an arithmetic number, because the mean of its divisors is an integer number (1766461141116).

Almost surely, 2^{20001200220020} is an apocalyptic number.

20001200220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001200220020 is an abundant number, since it is smaller than the sum of its proper divisors (22393867166764).

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

20001200220020 is a wasteful number, since it uses less digits than its factorization.

20001200220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9346355359 (or 9346355357 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20001200220020 its reverse (2002200210002), we get a palindrome (22003400430022).

The spelling of 20001200220020 in words is "twenty trillion, one billion, two hundred million, two hundred twenty thousand, twenty".