23508947909 has 2 divisors, whose sum is σ = 23508947910. Its totient is φ = 23508947908.

The previous prime is 23508947899. The next prime is 23508947941. The reversal of 23508947909 is 90974980532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23484643009 + 24304900 = 153247^2 + 4930^2 .

It is a cyclic number.

It is not a de Polignac number, because 23508947909 - 2¹² = 23508943813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23508947009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11754473954 + 11754473955.

It is an arithmetic number, because the mean of its divisors is an integer number (11754473955).

Almost surely, 2^23508947909 is an apocalyptic number.

It is an amenable number.

23508947909 is a deficient number, since it is larger than the sum of its proper divisors (1).

23508947909 is an equidigital number, since it uses as much as digits as its factorization.

23508947909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 23508947909 in words is "twenty-three billion, five hundred eight million, nine hundred forty-seven thousand, nine hundred nine".