20817041968 has 40 divisors (see below), whose sum is σ = 40625265888. Its totient is φ = 10333220352.

The previous prime is 20817041939. The next prime is 20817041983. The reversal of 20817041968 is 86914071802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3596805 + ... + 3602587.

Almost surely, 2^20817041968 is an apocalyptic number.

It is an amenable number.

20817041968 is a deficient number, since it is larger than the sum of its proper divisors (19808223920).

20817041968 is a wasteful number, since it uses less digits than its factorization.

20817041968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381 (or 7375 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 20817041968 in words is "twenty billion, eight hundred seventeen million, forty-one thousand, nine hundred sixty-eight".