21662463982163 has 2 divisors, whose sum is σ = 21662463982164. Its totient is φ = 21662463982162.

The previous prime is 21662463982121. The next prime is 21662463982193. The reversal of 21662463982163 is 36128936426612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21662463982163 - 2²⁸ = 21662195546707 is a prime.

It is not a weakly prime, because it can be changed into another prime (21662463982193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10831231991081 + 10831231991082.

It is an arithmetic number, because the mean of its divisors is an integer number (10831231991082).

Almost surely, 2^{21662463982163} is an apocalyptic number.

21662463982163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21662463982163 is an equidigital number, since it uses as much as digits as its factorization.

21662463982163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 59.

The spelling of 21662463982163 in words is "twenty-one trillion, six hundred sixty-two billion, four hundred sixty-three million, nine hundred eighty-two thousand, one hundred sixty-three".