20223123209 has 2 divisors, whose sum is σ = 20223123210. Its totient is φ = 20223123208.

The previous prime is 20223123197. The next prime is 20223123223. The reversal of 20223123209 is 90232132202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20222262025 + 861184 = 142205^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 20223123209 - 2¹² = 20223119113 is a prime.

It is not a weakly prime, because it can be changed into another prime (20223123289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111561604 + 10111561605.

It is an arithmetic number, because the mean of its divisors is an integer number (10111561605).

Almost surely, 2^20223123209 is an apocalyptic number.

It is an amenable number.

20223123209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223123209 is an equidigital number, since it uses as much as digits as its factorization.

20223123209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 20223123209 in words is "twenty billion, two hundred twenty-three million, one hundred twenty-three thousand, two hundred nine".