20317516992 has 84 divisors (see below), whose sum is σ = 60768555120. Its totient is φ = 6478044672.

The previous prime is 20317516991. The next prime is 20317517009. The reversal of 20317516992 is 29961571302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20317516991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 753567 + ... + 780062.

It is an arithmetic number, because the mean of its divisors is an integer number (723435180).

Almost surely, 2^20317516992 is an apocalyptic number.

It is an amenable number.

20317516992 is an abundant number, since it is smaller than the sum of its proper divisors (40451038128).

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

20317516992 is a wasteful number, since it uses less digits than its factorization.

20317516992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533670 (or 1533657 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 20317516992 in words is "twenty billion, three hundred seventeen million, five hundred sixteen thousand, nine hundred ninety-two".