202300021 has 16 divisors (see below), whose sum is σ = 254314368. Its totient is φ = 157629120.

The previous prime is 202300013. The next prime is 202300031. The reversal of 202300021 is 120003202.

It is not a de Polignac number, because 202300021 - 2³ = 202300013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202299980 and 202300007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202300031) 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, 1540 + ... + 20173.

It is an arithmetic number, because the mean of its divisors is an integer number (15894648).

Almost surely, 2^202300021 is an apocalyptic number.

It is an amenable number.

202300021 is a deficient number, since it is larger than the sum of its proper divisors (52014347).

202300021 is an equidigital number, since it uses as much as digits as its factorization.

202300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21753 (or 21731 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 202300021 is about 14223.2211893087. The cubic root of 202300021 is about 587.0367760093.

Adding to 202300021 its reverse (120003202), we get a palindrome (322303223).

The spelling of 202300021 in words is "two hundred two million, three hundred thousand, twenty-one".