210011200000020 has 36 divisors (see below), whose sum is σ = 637033973333940. Its totient is φ = 56002986666624.

The previous prime is 210011200000003. The next prime is 210011200000033. The reversal of 210011200000020 is 20000002110012.

It can be written as a sum of positive squares in 2 ways, for example, as 86206545423504 + 123804654576516 = 9284748^2 + 11126754^2 .

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 = 210011199999948 and 210011200000011.

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, 583364444265 + ... + 583364444624.

It is an arithmetic number, because the mean of its divisors is an integer number (17695388148165).

Almost surely, 2^{210011200000020} is an apocalyptic number.

210011200000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210011200000020 is an abundant number, since it is smaller than the sum of its proper divisors (427022773333920).

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

210011200000020 is a wasteful number, since it uses less digits than its factorization.

210011200000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166728888904 (or 1166728888899 counting only the distinct ones).

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

Adding to 210011200000020 its reverse (20000002110012), we get a palindrome (230011202110032).

The spelling of 210011200000020 in words is "two hundred ten trillion, eleven billion, two hundred million, twenty", and thus it is an aban number.