20210200020 has 144 divisors (see below), whose sum is σ = 61726758912. Its totient is φ = 5352399360.

The previous prime is 20210200019. The next prime is 20210200057. The reversal of 20210200020 is 2000201202.

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 = 20210199975 and 20210200011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23418109 + ... + 23418971.

It is an arithmetic number, because the mean of its divisors is an integer number (428658048).

Almost surely, 2^20210200020 is an apocalyptic number.

20210200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20210200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30863379456).

20210200020 is an abundant number, since it is smaller than the sum of its proper divisors (41516558892).

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

20210200020 is a wasteful number, since it uses less digits than its factorization.

20210200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20210200020 its reverse (2000201202), we get a palindrome (22210401222).

The spelling of 20210200020 in words is "twenty billion, two hundred ten million, two hundred thousand, twenty".