23521025009 has 2 divisors, whose sum is σ = 23521025010. Its totient is φ = 23521025008.

The previous prime is 23521024997. The next prime is 23521025039. The reversal of 23521025009 is 90052012532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23255335009 + 265690000 = 152497^2 + 16300^2 .

It is a cyclic number.

It is not a de Polignac number, because 23521025009 - 2³² = 19226057713 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23521025039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760512504 + 11760512505.

It is an arithmetic number, because the mean of its divisors is an integer number (11760512505).

Almost surely, 2^23521025009 is an apocalyptic number.

It is an amenable number.

23521025009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23521025009 is an equidigital number, since it uses as much as digits as its factorization.

23521025009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 23521025009 in words is "twenty-three billion, five hundred twenty-one million, twenty-five thousand, nine".