21067552067 has 2 divisors, whose sum is σ = 21067552068. Its totient is φ = 21067552066.

The previous prime is 21067552061. The next prime is 21067552069. The reversal of 21067552067 is 76025576012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21067552067 - 2⁶ = 21067552003 is a prime.

Together with 21067552069, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21067552061) 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, 10533776033 + 10533776034.

It is an arithmetic number, because the mean of its divisors is an integer number (10533776034).

Almost surely, 2^21067552067 is an apocalyptic number.

21067552067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21067552067 is an equidigital number, since it uses as much as digits as its factorization.

21067552067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 21067552067 in words is "twenty-one billion, sixty-seven million, five hundred fifty-two thousand, sixty-seven".