20013113101020 has 144 divisors (see below), whose sum is σ = 60779793144672. Its totient is φ = 4918106419200.

The previous prime is 20013113100913. The next prime is 20013113101027. The reversal of 20013113101020 is 2010131131002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013113101027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4452144 + ... + 7736136.

It is an arithmetic number, because the mean of its divisors is an integer number (422081896838).

Almost surely, 2^{20013113101020} is an apocalyptic number.

20013113101020 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 20013113101020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30389896572336).

20013113101020 is an abundant number, since it is smaller than the sum of its proper divisors (40766680043652).

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

20013113101020 is a wasteful number, since it uses less digits than its factorization.

20013113101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284632 (or 3284617 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20013113101020 its reverse (2010131131002), we get a palindrome (22023244232022).

The spelling of 20013113101020 in words is "twenty trillion, thirteen billion, one hundred thirteen million, one hundred one thousand, twenty".