20211020020 has 24 divisors (see below), whose sum is σ = 42494747904. Its totient is φ = 8074578336.

The previous prime is 20211019991. The next prime is 20211020021. The reversal of 20211020020 is 2002011202.

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 = 20211019979 and 20211020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211020021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597484 + ... + 630403.

It is an arithmetic number, because the mean of its divisors is an integer number (1770614496).

Almost surely, 2^20211020020 is an apocalyptic number.

20211020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211020020 is an abundant number, since it is smaller than the sum of its proper divisors (22283727884).

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

20211020020 is a wasteful number, since it uses less digits than its factorization.

20211020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228719 (or 1228717 counting only the distinct ones).

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

Adding to 20211020020 its reverse (2002011202), we get a palindrome (22213031222).

The spelling of 20211020020 in words is "twenty billion, two hundred eleven million, twenty thousand, twenty".