21516545436112 has 40 divisors (see below), whose sum is σ = 42969173296896. Its totient is φ = 10431378967296.

The previous prime is 21516545436107. The next prime is 21516545436167. The reversal of 21516545436112 is 21163454561512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114044608 + ... + 114233119.

Almost surely, 2^{21516545436112} is an apocalyptic number.

It is an amenable number.

21516545436112 is a deficient number, since it is larger than the sum of its proper divisors (21452627860784).

21516545436112 is a wasteful number, since it uses less digits than its factorization.

21516545436112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228277915 (or 228277909 counting only the distinct ones).

The product of its digits is 864000, while the sum is 46.

Adding to 21516545436112 its reverse (21163454561512), we get a palindrome (42679999997624).

The spelling of 21516545436112 in words is "twenty-one trillion, five hundred sixteen billion, five hundred forty-five million, four hundred thirty-six thousand, one hundred twelve".