20203200021 has 16 divisors (see below), whose sum is σ = 28134561600. Its totient is φ = 12882659328.

The previous prime is 20203200007. The next prime is 20203200047. The reversal of 20203200021 is 12000230202.

It is not a de Polignac number, because 20203200021 - 2²¹ = 20201102869 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203200421) 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, 1535916 + ... + 1549013.

It is an arithmetic number, because the mean of its divisors is an integer number (1758410100).

Almost surely, 2^20203200021 is an apocalyptic number.

It is an amenable number.

20203200021 is a deficient number, since it is larger than the sum of its proper divisors (7931361579).

20203200021 is a wasteful number, since it uses less digits than its factorization.

20203200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085028.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20203200021 its reverse (12000230202), we get a palindrome (32203430223).

The spelling of 20203200021 in words is "twenty billion, two hundred three million, two hundred thousand, twenty-one".