20243023 has 4 divisors (see below), whose sum is σ = 20528208. Its totient is φ = 19957840.

The previous prime is 20243021. The next prime is 20243029. The reversal of 20243023 is 32034202.

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

It is a cyclic number.

It is not a de Polignac number, because 20243023 - 2¹ = 20243021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20242988 and 20243006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243021) 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, 142486 + ... + 142627.

It is an arithmetic number, because the mean of its divisors is an integer number (5132052).

Almost surely, 2^20243023 is an apocalyptic number.

20243023 is a deficient number, since it is larger than the sum of its proper divisors (285185).

20243023 is an equidigital number, since it uses as much as digits as its factorization.

20243023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285184.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20243023 is about 4499.2247109919. The cubic root of 20243023 is about 272.5367815009.

Adding to 20243023 its reverse (32034202), we get a palindrome (52277225).

The spelling of 20243023 in words is "twenty million, two hundred forty-three thousand, twenty-three".