20100112020 has 36 divisors (see below), whose sum is σ = 60970340340. Its totient is φ = 5360029824.

The previous prime is 20100112001. The next prime is 20100112033. The reversal of 20100112020 is 2021100102.

It can be written as a sum of positive squares in 2 ways, for example, as 7713757584 + 12386354436 = 87828^2 + 111294^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20100111993 and 20100112011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55833465 + ... + 55833824.

It is an arithmetic number, because the mean of its divisors is an integer number (1693620565).

Almost surely, 2^20100112020 is an apocalyptic number.

20100112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100112020 is an abundant number, since it is smaller than the sum of its proper divisors (40870228320).

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

20100112020 is a wasteful number, since it uses less digits than its factorization.

20100112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111667304 (or 111667299 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20100112020 its reverse (2021100102), we get a palindrome (22121212122).

The spelling of 20100112020 in words is "twenty billion, one hundred million, one hundred twelve thousand, twenty".