21670962167 has 2 divisors, whose sum is σ = 21670962168. Its totient is φ = 21670962166.

The previous prime is 21670962139. The next prime is 21670962169. The reversal of 21670962167 is 76126907612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21670962167 - 2⁸ = 21670961911 is a prime.

Together with 21670962169, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21670962169) 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, 10835481083 + 10835481084.

It is an arithmetic number, because the mean of its divisors is an integer number (10835481084).

Almost surely, 2^21670962167 is an apocalyptic number.

21670962167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21670962167 is an equidigital number, since it uses as much as digits as its factorization.

21670962167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 21670962167 in words is "twenty-one billion, six hundred seventy million, nine hundred sixty-two thousand, one hundred sixty-seven".