20568247580 has 24 divisors (see below), whose sum is σ = 43203434400. Its totient is φ = 8225372480.

The previous prime is 20568247573. The next prime is 20568247597. The reversal of 20568247580 is 8574286502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31256 + ... + 205215.

It is an arithmetic number, because the mean of its divisors is an integer number (1800143100).

Almost surely, 2^20568247580 is an apocalyptic number.

20568247580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20568247580 is an abundant number, since it is smaller than the sum of its proper divisors (22635186820).

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

20568247580 is a wasteful number, since it uses less digits than its factorization.

20568247580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240829 (or 240827 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 20568247580 in words is "twenty billion, five hundred sixty-eight million, two hundred forty-seven thousand, five hundred eighty".