20002101000020 has 24 divisors (see below), whose sum is σ = 42412221930624. Its totient is φ = 7923162337056.

The previous prime is 20002100999977. The next prime is 20002101000023. The reversal of 20002101000020 is 2000010120002.

It is a junction number, because it is equal to n+sod(n) for n = 20002100999971 and 20002101000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002101000023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4854876824 + ... + 4854880943.

It is an arithmetic number, because the mean of its divisors is an integer number (1767175913776).

Almost surely, 2^{20002101000020} is an apocalyptic number.

20002101000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002101000020 is an abundant number, since it is smaller than the sum of its proper divisors (22410120930604).

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

20002101000020 is a wasteful number, since it uses less digits than its factorization.

20002101000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9709757879 (or 9709757877 counting only the distinct ones).

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

Adding to 20002101000020 its reverse (2000010120002), we get a palindrome (22002111120022).

The spelling of 20002101000020 in words is "twenty trillion, two billion, one hundred one million, twenty", and thus it is an aban number.