20565310560 has 96 divisors (see below), whose sum is σ = 67014591840. Its totient is φ = 5294972928.

The previous prime is 20565310543. The next prime is 20565310583. The reversal of 20565310560 is 6501356502.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 724777 + ... + 752616.

It is an arithmetic number, because the mean of its divisors is an integer number (698068665).

Almost surely, 2^20565310560 is an apocalyptic number.

20565310560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20565310560 is an abundant number, since it is smaller than the sum of its proper divisors (46449281280).

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

20565310560 is a wasteful number, since it uses less digits than its factorization.

20565310560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477440 (or 1477432 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 20565310560 in words is "twenty billion, five hundred sixty-five million, three hundred ten thousand, five hundred sixty".