20579742568 has 128 divisors (see below), whose sum is σ = 50303877120. Its totient is φ = 7653634560.

The previous prime is 20579742551. The next prime is 20579742577. The reversal of 20579742568 is 86524797502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8598780 + ... + 8601172.

It is an arithmetic number, because the mean of its divisors is an integer number (392999040).

Almost surely, 2^20579742568 is an apocalyptic number.

20579742568 is a gapful number since it is divisible by the number (28) 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 20579742568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25151938560).

20579742568 is an abundant number, since it is smaller than the sum of its proper divisors (29724134552).

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

20579742568 is a wasteful number, since it uses less digits than its factorization.

20579742568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047 (or 3043 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 20579742568 in words is "twenty billion, five hundred seventy-nine million, seven hundred forty-two thousand, five hundred sixty-eight".