20012020021020 has 48 divisors (see below), whose sum is σ = 56054189187360. Its totient is φ = 5334583136256.

The previous prime is 20012020020997. The next prime is 20012020021073. The reversal of 20012020021020 is 2012002021002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20012020020987 and 20012020021005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60945397 + ... + 61272876.

It is an arithmetic number, because the mean of its divisors is an integer number (1167795608070).

Almost surely, 2^{20012020021020} is an apocalyptic number.

20012020021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012020021020 is an abundant number, since it is smaller than the sum of its proper divisors (36042169166340).

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

20012020021020 is a wasteful number, since it uses less digits than its factorization.

20012020021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122221014 (or 122221012 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20012020021020 its reverse (2012002021002), we get a palindrome (22024022042022).

The spelling of 20012020021020 in words is "twenty trillion, twelve billion, twenty million, twenty-one thousand, twenty".