20668960680 has 64 divisors (see below), whose sum is σ = 62145144000. Its totient is φ = 5499432960.

The previous prime is 20668960661. The next prime is 20668960691. The reversal of 20668960680 is 8606986602.

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, 137926 + ... + 245685.

It is an arithmetic number, because the mean of its divisors is an integer number (971017875).

Almost surely, 2^20668960680 is an apocalyptic number.

20668960680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20668960680 is an abundant number, since it is smaller than the sum of its proper divisors (41476183320).

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

20668960680 is a wasteful number, since it uses less digits than its factorization.

20668960680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384074 (or 384070 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 20668960680 in words is "twenty billion, six hundred sixty-eight million, nine hundred sixty thousand, six hundred eighty".