21470062163617 has 2 divisors, whose sum is σ = 21470062163618. Its totient is φ = 21470062163616.

The previous prime is 21470062163597. The next prime is 21470062163659. The reversal of 21470062163617 is 71636126007412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21416449539681 + 53612623936 = 4627791^2 + 231544^2 .

It is a cyclic number.

It is not a de Polignac number, because 21470062163617 - 2¹⁹ = 21470061639329 is a prime.

It is not a weakly prime, because it can be changed into another prime (21470062163677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10735031081808 + 10735031081809.

It is an arithmetic number, because the mean of its divisors is an integer number (10735031081809).

Almost surely, 2^{21470062163617} is an apocalyptic number.

It is an amenable number.

21470062163617 is a deficient number, since it is larger than the sum of its proper divisors (1).

21470062163617 is an equidigital number, since it uses as much as digits as its factorization.

21470062163617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 21470062163617 in words is "twenty-one trillion, four hundred seventy billion, sixty-two million, one hundred sixty-three thousand, six hundred seventeen".