20020100021020 has 24 divisors (see below), whose sum is σ = 45864229139568. Its totient is φ = 7280036371200.

The previous prime is 20020100020997. The next prime is 20020100021039. The reversal of 20020100021020 is 2012000102002.

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 = 20020100020988 and 20020100021006.

It is a congruent number.

It is an unprimeable number.

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, 45500227101 + ... + 45500227540.

It is an arithmetic number, because the mean of its divisors is an integer number (1911009547482).

Almost surely, 2^{20020100021020} is an apocalyptic number.

20020100021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020100021020 is an abundant number, since it is smaller than the sum of its proper divisors (25844129118548).

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

20020100021020 is a wasteful number, since it uses less digits than its factorization.

20020100021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91000454661 (or 91000454659 counting only the distinct ones).

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

Adding to 20020100021020 its reverse (2012000102002), we get a palindrome (22032100123022).

The spelling of 20020100021020 in words is "twenty trillion, twenty billion, one hundred million, twenty-one thousand, twenty".