20011012012020 has 48 divisors (see below), whose sum is σ = 56123141534208. Its totient is φ = 5327478641280.

The previous prime is 20011012011961. The next prime is 20011012012073. The reversal of 20011012012020 is 2021021011002.

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 = 20011012011987 and 20011012012005.

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 15 ways as a sum of consecutive naturals, for example, 274689171 + ... + 274762010.

It is an arithmetic number, because the mean of its divisors is an integer number (1169232115296).

Almost surely, 2^{20011012012020} is an apocalyptic number.

20011012012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011012012020 is an abundant number, since it is smaller than the sum of its proper divisors (36112129522188).

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

20011012012020 is a wasteful number, since it uses less digits than its factorization.

20011012012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549451800 (or 549451798 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20011012012020 its reverse (2021021011002), we get a palindrome (22032033023022).

The spelling of 20011012012020 in words is "twenty trillion, eleven billion, twelve million, twelve thousand, twenty".