20113012020 has 96 divisors (see below), whose sum is σ = 59535665280. Its totient is φ = 5059307520.

The previous prime is 20113011991. The next prime is 20113012027. The reversal of 20113012020 is 2021031102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20113011987 and 20113012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113012027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227760 + ... + 303480.

It is an arithmetic number, because the mean of its divisors is an integer number (620163180).

Almost surely, 2^20113012020 is an apocalyptic number.

20113012020 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 20113012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29767832640).

20113012020 is an abundant number, since it is smaller than the sum of its proper divisors (39422653260).

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

20113012020 is a wasteful number, since it uses less digits than its factorization.

20113012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75985 (or 75983 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20113012020 its reverse (2021031102), we get a palindrome (22134043122).

The spelling of 20113012020 in words is "twenty billion, one hundred thirteen million, twelve thousand, twenty".