21163634130142 has 32 divisors (see below), whose sum is σ = 36294383803392. Its totient is φ = 9066662589024.

The previous prime is 21163634130139. The next prime is 21163634130169. The reversal of 21163634130142 is 24103143636112.

It is a super-2 number, since 2×21163634130142² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439447528 + ... + 439495684.

It is an arithmetic number, because the mean of its divisors is an integer number (1134199493856).

Almost surely, 2^{21163634130142} is an apocalyptic number.

21163634130142 is a deficient number, since it is larger than the sum of its proper divisors (15130749673250).

21163634130142 is a wasteful number, since it uses less digits than its factorization.

21163634130142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59512.

The product of its (nonzero) digits is 62208, while the sum is 37.

Adding to 21163634130142 its reverse (24103143636112), we get a palindrome (45266777766254).

The spelling of 21163634130142 in words is "twenty-one trillion, one hundred sixty-three billion, six hundred thirty-four million, one hundred thirty thousand, one hundred forty-two".