20656540060 has 48 divisors (see below), whose sum is σ = 46729460736. Its totient is φ = 7624760832.

The previous prime is 20656540049. The next prime is 20656540109. The reversal of 20656540060 is 6004565602.

It is a junction number, because it is equal to n+sod(n) for n = 20656539998 and 20656540025.

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 15 ways as a sum of consecutive naturals, for example, 1045029 + ... + 1064611.

It is an arithmetic number, because the mean of its divisors is an integer number (973530432).

Almost surely, 2^20656540060 is an apocalyptic number.

20656540060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20656540060 is an abundant number, since it is smaller than the sum of its proper divisors (26072920676).

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

20656540060 is a wasteful number, since it uses less digits than its factorization.

20656540060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23662 (or 23660 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 20656540060 in words is "twenty billion, six hundred fifty-six million, five hundred forty thousand, sixty".