20210200021 has 16 divisors (see below), whose sum is σ = 22894565760. Its totient is φ = 17671837120.

The previous prime is 20210200019. The next prime is 20210200057. The reversal of 20210200021 is 12000201202.

It is a cyclic number.

It is not a de Polignac number, because 20210200021 - 2¹ = 20210200019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20210199980 and 20210200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210200001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36550 + ... + 204343.

It is an arithmetic number, because the mean of its divisors is an integer number (1430910360).

Almost surely, 2^20210200021 is an apocalyptic number.

It is an amenable number.

20210200021 is a deficient number, since it is larger than the sum of its proper divisors (2684365739).

20210200021 is a wasteful number, since it uses less digits than its factorization.

20210200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241196.

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

Adding to 20210200021 its reverse (12000201202), we get a palindrome (32210401223).

The spelling of 20210200021 in words is "twenty billion, two hundred ten million, two hundred thousand, twenty-one".