20112010020 has 120 divisors (see below), whose sum is σ = 63181924344. Its totient is φ = 5355569664.

The previous prime is 20112010019. The next prime is 20112010057. The reversal of 20112010020 is 2001021102.

It can be written as a sum of positive squares in 4 ways, for example, as 5723527716 + 14388482304 = 75654^2 + 119952^2 .

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 = 20112009984 and 20112010011.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 1178992 + ... + 1195928.

Almost surely, 2^20112010020 is an apocalyptic number.

20112010020 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 20112010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31590962172).

20112010020 is an abundant number, since it is smaller than the sum of its proper divisors (43069914324).

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

20112010020 is a wasteful number, since it uses less digits than its factorization.

20112010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17691 (or 17680 counting only the distinct ones).

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

Adding to 20112010020 its reverse (2001021102), we get a palindrome (22113031122).

The spelling of 20112010020 in words is "twenty billion, one hundred twelve million, ten thousand, twenty".