26304346921 has 2 divisors, whose sum is σ = 26304346922. Its totient is φ = 26304346920.

The previous prime is 26304346919. The next prime is 26304346933. The reversal of 26304346921 is 12964340362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23887248025 + 2417098896 = 154555^2 + 49164^2 .

It is a cyclic number.

It is not a de Polignac number, because 26304346921 - 2¹ = 26304346919 is a prime.

Together with 26304346919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26304346121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13152173460 + 13152173461.

It is an arithmetic number, because the mean of its divisors is an integer number (13152173461).

Almost surely, 2^26304346921 is an apocalyptic number.

It is an amenable number.

26304346921 is a deficient number, since it is larger than the sum of its proper divisors (1).

26304346921 is an equidigital number, since it uses as much as digits as its factorization.

26304346921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 26304346921 in words is "twenty-six billion, three hundred four million, three hundred forty-six thousand, nine hundred twenty-one".