20002100120020 has 48 divisors (see below), whose sum is σ = 44216746882560. Its totient is φ = 7579472655744.

The previous prime is 20002100119973. The next prime is 20002100120029. The reversal of 20002100120020 is 2002100120002.

It is a super-2 number, since 2×20002100120020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20002100119979 and 20002100120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002100120029) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9884682 + ... + 11735038.

It is an arithmetic number, because the mean of its divisors is an integer number (921182226720).

Almost surely, 2^{20002100120020} is an apocalyptic number.

20002100120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002100120020 is an abundant number, since it is smaller than the sum of its proper divisors (24214646762540).

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

20002100120020 is a wasteful number, since it uses less digits than its factorization.

20002100120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878832 (or 1878830 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20002100120020 its reverse (2002100120002), we get a palindrome (22004200240022).

The spelling of 20002100120020 in words is "twenty trillion, two billion, one hundred million, one hundred twenty thousand, twenty".