20980716166 has 16 divisors (see below), whose sum is σ = 31596767280. Its totient is φ = 10448524800.

The previous prime is 20980716151. The next prime is 20980716223. The reversal of 20980716166 is 66161708902.

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, 664641 + ... + 695491.

It is an arithmetic number, because the mean of its divisors is an integer number (1974797955).

Almost surely, 2^20980716166 is an apocalyptic number.

20980716166 is a deficient number, since it is larger than the sum of its proper divisors (10616051114).

20980716166 is a wasteful number, since it uses less digits than its factorization.

20980716166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32199.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 20980716166 in words is "twenty billion, nine hundred eighty million, seven hundred sixteen thousand, one hundred sixty-six".