20312488768 has 84 divisors (see below), whose sum is σ = 47713358980. Its totient is φ = 8522680320.

The previous prime is 20312488753. The next prime is 20312488829. The reversal of 20312488768 is 86788421302.

It can be written as a sum of positive squares in 2 ways, for example, as 9049336384 + 11263152384 = 95128^2 + 106128^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213 + ... + 201556.

Almost surely, 2^20312488768 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 20312488768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23856679490).

20312488768 is an abundant number, since it is smaller than the sum of its proper divisors (27400870212).

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

20312488768 is a wasteful number, since it uses less digits than its factorization.

20312488768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201816 (or 201795 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 20312488768 in words is "twenty billion, three hundred twelve million, four hundred eighty-eight thousand, seven hundred sixty-eight".