21276108367 has 2 divisors, whose sum is σ = 21276108368. Its totient is φ = 21276108366.

The previous prime is 21276108349. The next prime is 21276108391. The reversal of 21276108367 is 76380167212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21276108367 - 2⁷ = 21276108239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21276108067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10638054183 + 10638054184.

It is an arithmetic number, because the mean of its divisors is an integer number (10638054184).

Almost surely, 2^21276108367 is an apocalyptic number.

21276108367 is a deficient number, since it is larger than the sum of its proper divisors (1).

21276108367 is an equidigital number, since it uses as much as digits as its factorization.

21276108367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 21276108367 in words is "twenty-one billion, two hundred seventy-six million, one hundred eight thousand, three hundred sixty-seven".