20727934680 has 64 divisors (see below), whose sum is σ = 62970969600. Its totient is φ = 5457479040.

The previous prime is 20727934657. The next prime is 20727934681. The reversal of 20727934680 is 8643972702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20727934681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1083766 + ... + 1102725.

It is an arithmetic number, because the mean of its divisors is an integer number (983921400).

Almost surely, 2^20727934680 is an apocalyptic number.

20727934680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20727934680 is an abundant number, since it is smaller than the sum of its proper divisors (42243034920).

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

20727934680 is a wasteful number, since it uses less digits than its factorization.

20727934680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186584 (or 2186580 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 20727934680 in words is "twenty billion, seven hundred twenty-seven million, nine hundred thirty-four thousand, six hundred eighty".