23012102809 has 2 divisors, whose sum is σ = 23012102810. Its totient is φ = 23012102808.

The previous prime is 23012102801. The next prime is 23012102821. The reversal of 23012102809 is 90820121032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16341787225 + 6670315584 = 127835^2 + 81672^2 .

It is a cyclic number.

It is not a de Polignac number, because 23012102809 - 2³ = 23012102801 is a prime.

It is not a weakly prime, because it can be changed into another prime (23012102801) 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, 11506051404 + 11506051405.

It is an arithmetic number, because the mean of its divisors is an integer number (11506051405).

Almost surely, 2^23012102809 is an apocalyptic number.

It is an amenable number.

23012102809 is a deficient number, since it is larger than the sum of its proper divisors (1).

23012102809 is an equidigital number, since it uses as much as digits as its factorization.

23012102809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 23012102809 in words is "twenty-three billion, twelve million, one hundred two thousand, eight hundred nine".