20239223 has 4 divisors (see below), whose sum is σ = 20466720. Its totient is φ = 20011728.

The previous prime is 20239181. The next prime is 20239253. The reversal of 20239223 is 32293202.

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 20239223 - 2¹⁰ = 20238199 is a prime.

It is a super-2 number, since 2×20239223² = 819252295287458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20239253) 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, 113615 + ... + 113792.

It is an arithmetic number, because the mean of its divisors is an integer number (5116680).

Almost surely, 2^20239223 is an apocalyptic number.

20239223 is a deficient number, since it is larger than the sum of its proper divisors (227497).

20239223 is an equidigital number, since it uses as much as digits as its factorization.

20239223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227496.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20239223 is about 4498.8023961939. The cubic root of 20239223 is about 272.5197269898.

The spelling of 20239223 in words is "twenty million, two hundred thirty-nine thousand, two hundred twenty-three".