200003023021 has 4 divisors (see below), whose sum is σ = 200041044444. Its totient is φ = 199965001600.

The previous prime is 200003023013. The next prime is 200003023027. The reversal of 200003023021 is 120320300002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66945870121 + 133057152900 = 258739^2 + 364770^2 .

It is a cyclic number.

It is not a de Polignac number, because 200003023021 - 2³ = 200003023013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200003022992 and 200003023010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200003023027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19002820 + ... + 19013341.

It is an arithmetic number, because the mean of its divisors is an integer number (50010261111).

Almost surely, 2^200003023021 is an apocalyptic number.

It is an amenable number.

200003023021 is a deficient number, since it is larger than the sum of its proper divisors (38021423).

200003023021 is an equidigital number, since it uses as much as digits as its factorization.

200003023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38021422.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 200003023021 its reverse (120320300002), we get a palindrome (320323323023).

The spelling of 200003023021 in words is "two hundred billion, three million, twenty-three thousand, twenty-one".