20068715256 has 64 divisors (see below), whose sum is σ = 52071465600. Its totient is φ = 6437789568.

The previous prime is 20068715197. The next prime is 20068715267. The reversal of 20068715256 is 65251786002.

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, 166711 + ... + 260633.

It is an arithmetic number, because the mean of its divisors is an integer number (813616650).

Almost surely, 2^20068715256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20068715256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26035732800).

20068715256 is an abundant number, since it is smaller than the sum of its proper divisors (32002750344).

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

20068715256 is a wasteful number, since it uses less digits than its factorization.

20068715256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94268 (or 94264 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 20068715256 in words is "twenty billion, sixty-eight million, seven hundred fifteen thousand, two hundred fifty-six".