21076267 has 2 divisors, whose sum is σ = 21076268. Its totient is φ = 21076266.

The previous prime is 21076261. The next prime is 21076271. The reversal of 21076267 is 76267012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21076267 - 2¹⁵ = 21043499 is a prime.

It is not a weakly prime, because it can be changed into another prime (21076261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10538133 + 10538134.

It is an arithmetic number, because the mean of its divisors is an integer number (10538134).

Almost surely, 2^21076267 is an apocalyptic number.

21076267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21076267 is an equidigital number, since it uses as much as digits as its factorization.

21076267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 21076267 is about 4590.8895652150. The cubic root of 21076267 is about 276.2260059830.

The spelling of 21076267 in words is "twenty-one million, seventy-six thousand, two hundred sixty-seven".