21163634130213 has 16 divisors (see below), whose sum is σ = 31406404803840. Its totient is φ = 14085296678592.

The previous prime is 21163634130187. The next prime is 21163634130217. The reversal of 21163634130213 is 31203143636112.

21163634130213 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 3 + 6 + 341 + 302 + 1 + 3 = 666.

It is not a de Polignac number, because 21163634130213 - 2²⁵ = 21163600575781 is a prime.

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, 660893181 + ... + 660925202.

It is an arithmetic number, because the mean of its divisors is an integer number (1962900300240).

Almost surely, 2^{21163634130213} is an apocalyptic number.

It is an amenable number.

21163634130213 is a deficient number, since it is larger than the sum of its proper divisors (10242770673627).

21163634130213 is a wasteful number, since it uses less digits than its factorization.

21163634130213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321818985 (or 1321818979 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

Adding to 21163634130213 its reverse (31203143636112), we get a palindrome (52366777766325).

The spelling of 21163634130213 in words is "twenty-one trillion, one hundred sixty-three billion, six hundred thirty-four million, one hundred thirty thousand, two hundred thirteen".