202320023 has 4 divisors (see below), whose sum is σ = 204176280. Its totient is φ = 200463768.

The previous prime is 202319989. The next prime is 202320073. The reversal of 202320023 is 320023202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202320023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202320073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927965 + ... + 928182.

It is an arithmetic number, because the mean of its divisors is an integer number (51044070).

Almost surely, 2^202320023 is an apocalyptic number.

202320023 is a deficient number, since it is larger than the sum of its proper divisors (1856257).

202320023 is a wasteful number, since it uses less digits than its factorization.

202320023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856256.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 202320023 is about 14223.9243178527. The cubic root of 202320023 is about 587.0561227244.

Adding to 202320023 its reverse (320023202), we get a palindrome (522343225).

It can be divided in two parts, 202 and 320023, that multiplied together give a palindrome (64644646).

The spelling of 202320023 in words is "two hundred two million, three hundred twenty thousand, twenty-three".