20001020113220 has 48 divisors (see below), whose sum is σ = 43837490511360. Its totient is φ = 7650963424896.

The previous prime is 20001020113157. The next prime is 20001020113267. The reversal of 20001020113220 is 2231102010002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20001020113195 and 20001020113204.

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, 2345135 + ... + 6745494.

It is an arithmetic number, because the mean of its divisors is an integer number (913281052320).

Almost surely, 2^{20001020113220} is an apocalyptic number.

20001020113220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001020113220 is an abundant number, since it is smaller than the sum of its proper divisors (23836470398140).

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

20001020113220 is a wasteful number, since it uses less digits than its factorization.

20001020113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9095444 (or 9095442 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20001020113220 its reverse (2231102010002), we get a palindrome (22232122123222).

The spelling of 20001020113220 in words is "twenty trillion, one billion, twenty million, one hundred thirteen thousand, two hundred twenty".