21104340167 has 2 divisors, whose sum is σ = 21104340168. Its totient is φ = 21104340166.

The previous prime is 21104340157. The next prime is 21104340263. The reversal of 21104340167 is 76104340112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21104340167 - 2⁴ = 21104340151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21104340137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10552170083 + 10552170084.

It is an arithmetic number, because the mean of its divisors is an integer number (10552170084).

Almost surely, 2^21104340167 is an apocalyptic number.

21104340167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104340167 is an equidigital number, since it uses as much as digits as its factorization.

21104340167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 21104340167 its reverse (76104340112), we get a palindrome (97208680279).

Subtracting 21104340167 from its reverse (76104340112), we obtain a palindrome (54999999945).

The spelling of 21104340167 in words is "twenty-one billion, one hundred four million, three hundred forty thousand, one hundred sixty-seven".