20001113020 has 144 divisors (see below), whose sum is σ = 51937925760. Its totient is φ = 6428706816.

The previous prime is 20001112997. The next prime is 20001113063. The reversal of 20001113020 is 2031110002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20001112988 and 20001113006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4479309 + ... + 4483771.

It is an arithmetic number, because the mean of its divisors is an integer number (360680040).

Almost surely, 2^20001113020 is an apocalyptic number.

20001113020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001113020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25968962880).

20001113020 is an abundant number, since it is smaller than the sum of its proper divisors (31936812740).

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

20001113020 is a wasteful number, since it uses less digits than its factorization.

20001113020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4772 (or 4763 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20001113020 its reverse (2031110002), we get a palindrome (22032223022).

The spelling of 20001113020 in words is "twenty billion, one million, one hundred thirteen thousand, twenty".