21200706716 has 18 divisors (see below), whose sum is σ = 43158581928. Its totient is φ = 9086017080.

The previous prime is 21200706707. The next prime is 21200706743. The reversal of 21200706716 is 61760700212.

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 5 ways as a sum of consecutive naturals, for example, 54083240 + ... + 54083631.

It is an arithmetic number, because the mean of its divisors is an integer number (2397698996).

Almost surely, 2^21200706716 is an apocalyptic number.

It is an amenable number.

21200706716 is an abundant number, since it is smaller than the sum of its proper divisors (21957875212).

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

21200706716 is a wasteful number, since it uses less digits than its factorization.

21200706716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108166889 (or 108166880 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 21200706716 in words is "twenty-one billion, two hundred million, seven hundred six thousand, seven hundred sixteen".