21876268067 has 2 divisors, whose sum is σ = 21876268068. Its totient is φ = 21876268066.

The previous prime is 21876268061. The next prime is 21876268091. The reversal of 21876268067 is 76086267812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21876268067 - 2¹² = 21876263971 is a prime.

It is a super-2 number, since 2×21876268067² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21876268061) 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, 10938134033 + 10938134034.

It is an arithmetic number, because the mean of its divisors is an integer number (10938134034).

Almost surely, 2^21876268067 is an apocalyptic number.

21876268067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21876268067 is an equidigital number, since it uses as much as digits as its factorization.

21876268067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 21876268067 in words is "twenty-one billion, eight hundred seventy-six million, two hundred sixty-eight thousand, sixty-seven".