23256069821 has 2 divisors, whose sum is σ = 23256069822. Its totient is φ = 23256069820.

The previous prime is 23256069797. The next prime is 23256069917. The reversal of 23256069821 is 12896065232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21225576100 + 2030493721 = 145690^2 + 45061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23256069821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23256069721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11628034910 + 11628034911.

It is an arithmetic number, because the mean of its divisors is an integer number (11628034911).

Almost surely, 2^23256069821 is an apocalyptic number.

It is an amenable number.

23256069821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23256069821 is an equidigital number, since it uses as much as digits as its factorization.

23256069821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 23256069821 in words is "twenty-three billion, two hundred fifty-six million, sixty-nine thousand, eight hundred twenty-one".