21218482163 has 2 divisors, whose sum is σ = 21218482164. Its totient is φ = 21218482162.

The previous prime is 21218482141. The next prime is 21218482223. The reversal of 21218482163 is 36128481212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21218482163 - 2¹² = 21218478067 is a prime.

It is not a weakly prime, because it can be changed into another prime (21218482133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10609241081 + 10609241082.

It is an arithmetic number, because the mean of its divisors is an integer number (10609241082).

Almost surely, 2^21218482163 is an apocalyptic number.

21218482163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21218482163 is an equidigital number, since it uses as much as digits as its factorization.

21218482163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 38.

The spelling of 21218482163 in words is "twenty-one billion, two hundred eighteen million, four hundred eighty-two thousand, one hundred sixty-three".