20548768560 has 320 divisors, whose sum is σ = 67907082240. Its totient is φ = 5129625600.

The previous prime is 20548768549. The next prime is 20548768561. The reversal of 20548768560 is 6586784502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20548768561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74183142 + ... + 74183418.

It is an arithmetic number, because the mean of its divisors is an integer number (212209632).

Almost surely, 2^20548768560 is an apocalyptic number.

20548768560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20548768560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33953541120).

20548768560 is an abundant number, since it is smaller than the sum of its proper divisors (47358313680).

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

20548768560 is a wasteful number, since it uses less digits than its factorization.

20548768560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 20548768560 in words is "twenty billion, five hundred forty-eight million, seven hundred sixty-eight thousand, five hundred sixty".