21163634130216 has 64 divisors (see below), whose sum is σ = 55057148467200. Its totient is φ = 6773697620928.

The previous prime is 21163634130187. The next prime is 21163634130217. The reversal of 21163634130216 is 61203143636112.

It is not an unprimeable number, because it can be changed into a prime (21163634130217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173730616 + ... + 173852391.

It is an arithmetic number, because the mean of its divisors is an integer number (860267944800).

Almost surely, 2^{21163634130216} is an apocalyptic number.

It is an amenable number.

21163634130216 is an abundant number, since it is smaller than the sum of its proper divisors (33893514336984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21163634130216 is a wasteful number, since it uses less digits than its factorization.

21163634130216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347583118 (or 347583114 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

Adding to 21163634130216 its reverse (61203143636112), we get a palindrome (82366777766328).

The spelling of 21163634130216 in words is "twenty-one trillion, one hundred sixty-three billion, six hundred thirty-four million, one hundred thirty thousand, two hundred sixteen".