20223431729 has 2 divisors, whose sum is σ = 20223431730. Its totient is φ = 20223431728.

The previous prime is 20223431633. The next prime is 20223431759. The reversal of 20223431729 is 92713432202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10633734400 + 9589697329 = 103120^2 + 97927^2 .

It is a cyclic number.

It is not a de Polignac number, because 20223431729 - 2²⁴ = 20206654513 is a prime.

It is not a weakly prime, because it can be changed into another prime (20223431759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111715864 + 10111715865.

It is an arithmetic number, because the mean of its divisors is an integer number (10111715865).

Almost surely, 2^20223431729 is an apocalyptic number.

It is an amenable number.

20223431729 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223431729 is an equidigital number, since it uses as much as digits as its factorization.

20223431729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 20223431729 in words is "twenty billion, two hundred twenty-three million, four hundred thirty-one thousand, seven hundred twenty-nine".