21163634130215 has 16 divisors (see below), whose sum is σ = 25438282505856. Its totient is φ = 16902982387200.

The previous prime is 21163634130187. The next prime is 21163634130217. The reversal of 21163634130215 is 51203143636112.

It is a de Polignac number, because none of the positive numbers 2^k-21163634130215 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 6015170 + ... + 8860560.

It is an arithmetic number, because the mean of its divisors is an integer number (1589892656616).

Almost surely, 2^{21163634130215} is an apocalyptic number.

21163634130215 is a deficient number, since it is larger than the sum of its proper divisors (4274648375641).

21163634130215 is a wasteful number, since it uses less digits than its factorization.

21163634130215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847850.

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 21163634130215 its reverse (51203143636112), we get a palindrome (72366777766327).

The spelling of 21163634130215 in words is "twenty-one trillion, one hundred sixty-three billion, six hundred thirty-four million, one hundred thirty thousand, two hundred fifteen".