23305621553 has 2 divisors, whose sum is σ = 23305621554. Its totient is φ = 23305621552.

The previous prime is 23305621541. The next prime is 23305621571. The reversal of 23305621553 is 35512650332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13122389809 + 10183231744 = 114553^2 + 100912^2 .

It is a cyclic number.

It is not a de Polignac number, because 23305621553 - 2²² = 23301427249 is a prime.

It is not a weakly prime, because it can be changed into another prime (23305621523) 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, 11652810776 + 11652810777.

It is an arithmetic number, because the mean of its divisors is an integer number (11652810777).

Almost surely, 2^23305621553 is an apocalyptic number.

It is an amenable number.

23305621553 is a deficient number, since it is larger than the sum of its proper divisors (1).

23305621553 is an equidigital number, since it uses as much as digits as its factorization.

23305621553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 35.

The spelling of 23305621553 in words is "twenty-three billion, three hundred five million, six hundred twenty-one thousand, five hundred fifty-three".