21364830163 has 2 divisors, whose sum is σ = 21364830164. Its totient is φ = 21364830162.

The previous prime is 21364830131. The next prime is 21364830181. The reversal of 21364830163 is 36103846312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21364830163 - 2⁵ = 21364830131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21364830103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10682415081 + 10682415082.

It is an arithmetic number, because the mean of its divisors is an integer number (10682415082).

Almost surely, 2^21364830163 is an apocalyptic number.

21364830163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21364830163 is an equidigital number, since it uses as much as digits as its factorization.

21364830163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 21364830163 in words is "twenty-one billion, three hundred sixty-four million, eight hundred thirty thousand, one hundred sixty-three".