20223839 has 2 divisors, whose sum is σ = 20223840. Its totient is φ = 20223838.

The previous prime is 20223787. The next prime is 20223857. The reversal of 20223839 is 93832202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20223839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20223139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111919 + 10111920.

It is an arithmetic number, because the mean of its divisors is an integer number (10111920).

Almost surely, 2^20223839 is an apocalyptic number.

20223839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223839 is an equidigital number, since it uses as much as digits as its factorization.

20223839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20223839 is about 4497.0922827979. The cubic root of 20223839 is about 272.4506613251.

The spelling of 20223839 in words is "twenty million, two hundred twenty-three thousand, eight hundred thirty-nine".