21616006868052 has 24 divisors (see below), whose sum is σ = 51128271954816. Its totient is φ = 7106632394688.

The previous prime is 21616006868047. The next prime is 21616006868111. The reversal of 21616006868052 is 25086860061612.

It is a junction number, because it is equal to n+sod(n) for n = 21616006867986 and 21616006868004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12337902588 + ... + 12337904339.

It is an arithmetic number, because the mean of its divisors is an integer number (2130344664784).

Almost surely, 2^{21616006868052} is an apocalyptic number.

It is an amenable number.

21616006868052 is an abundant number, since it is smaller than the sum of its proper divisors (29512265086764).

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

21616006868052 is a wasteful number, since it uses less digits than its factorization.

21616006868052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24675807007 (or 24675807005 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 21616006868052 in words is "twenty-one trillion, six hundred sixteen billion, six million, eight hundred sixty-eight thousand, fifty-two".