23276387221 has 2 divisors, whose sum is σ = 23276387222. Its totient is φ = 23276387220.

The previous prime is 23276387177. The next prime is 23276387273. The reversal of 23276387221 is 12278367232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12353211025 + 10923176196 = 111145^2 + 104514^2 .

It is a cyclic number.

It is not a de Polignac number, because 23276387221 - 2⁷ = 23276387093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23276387291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11638193610 + 11638193611.

It is an arithmetic number, because the mean of its divisors is an integer number (11638193611).

Almost surely, 2^23276387221 is an apocalyptic number.

It is an amenable number.

23276387221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23276387221 is an equidigital number, since it uses as much as digits as its factorization.

23276387221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 43.

The spelling of 23276387221 in words is "twenty-three billion, two hundred seventy-six million, three hundred eighty-seven thousand, two hundred twenty-one".