21406313120016 has 80 divisors (see below), whose sum is σ = 60567228949248. Its totient is φ = 6460917840000.

The previous prime is 21406313119973. The next prime is 21406313120029. The reversal of 21406313120016 is 61002131360412.

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, 80628946 + ... + 80894001.

Almost surely, 2^{21406313120016} is an apocalyptic number.

It is an amenable number.

21406313120016 is an abundant number, since it is smaller than the sum of its proper divisors (39160915829232).

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

21406313120016 is a wasteful number, since it uses less digits than its factorization.

21406313120016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161523220 (or 161523214 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 21406313120016 its reverse (61002131360412), we get a palindrome (82408444480428).

The spelling of 21406313120016 in words is "twenty-one trillion, four hundred six billion, three hundred thirteen million, one hundred twenty thousand, sixteen".