20980640308 has 12 divisors (see below), whose sum is σ = 36757520352. Its totient is φ = 10478491640.

The previous prime is 20980640297. The next prime is 20980640363. The reversal of 20980640308 is 80304608902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2953138 + ... + 2960233.

It is an arithmetic number, because the mean of its divisors is an integer number (3063126696).

Almost surely, 2^20980640308 is an apocalyptic number.

It is an amenable number.

20980640308 is a deficient number, since it is larger than the sum of its proper divisors (15776880044).

20980640308 is a wasteful number, since it uses less digits than its factorization.

20980640308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5914262 (or 5914260 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 20980640308 in words is "twenty billion, nine hundred eighty million, six hundred forty thousand, three hundred eight".