20286869568 has 112 divisors (see below), whose sum is σ = 61572769920. Its totient is φ = 5774598144.

The previous prime is 20286869567. The next prime is 20286869591. The reversal of 20286869568 is 86596868202.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (20286869567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333480 + ... + 389592.

Almost surely, 2^20286869568 is an apocalyptic number.

20286869568 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 20286869568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30786384960).

20286869568 is an abundant number, since it is smaller than the sum of its proper divisors (41285900352).

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

20286869568 is a wasteful number, since it uses less digits than its factorization.

20286869568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56404 (or 56394 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 20286869568 in words is "twenty billion, two hundred eighty-six million, eight hundred sixty-nine thousand, five hundred sixty-eight".