23505221413 has 2 divisors, whose sum is σ = 23505221414. Its totient is φ = 23505221412.

The previous prime is 23505221393. The next prime is 23505221483. The reversal of 23505221413 is 31412250532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19631652769 + 3873568644 = 140113^2 + 62238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23505221413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23505221483) 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, 11752610706 + 11752610707.

It is an arithmetic number, because the mean of its divisors is an integer number (11752610707).

Almost surely, 2^23505221413 is an apocalyptic number.

It is an amenable number.

23505221413 is a deficient number, since it is larger than the sum of its proper divisors (1).

23505221413 is an equidigital number, since it uses as much as digits as its factorization.

23505221413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 23505221413 its reverse (31412250532), we get a palindrome (54917471945).

The spelling of 23505221413 in words is "twenty-three billion, five hundred five million, two hundred twenty-one thousand, four hundred thirteen".