20210011020 has 36 divisors (see below), whose sum is σ = 61303700640. Its totient is φ = 5389336224.

The previous prime is 20210011001. The next prime is 20210011021. The reversal of 20210011020 is 2011001202.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20210010993 and 20210011011.

It is not an unprimeable number, because it can be changed into a prime (20210011021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56138740 + ... + 56139099.

Almost surely, 2^20210011020 is an apocalyptic number.

20210011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210011020 is an abundant number, since it is smaller than the sum of its proper divisors (41093689620).

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

20210011020 is a wasteful number, since it uses less digits than its factorization.

20210011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112277854 (or 112277849 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20210011020 its reverse (2011001202), we get a palindrome (22221012222).

The spelling of 20210011020 in words is "twenty billion, two hundred ten million, eleven thousand, twenty".