20996289968 has 20 divisors (see below), whose sum is σ = 40812830520. Its totient is φ = 10463946624.

The previous prime is 20996289907. The next prime is 20996290001. The reversal of 20996289968 is 86998269902.

It is a junction number, because it is equal to n+sod(n) for n = 20996289898 and 20996289907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2132333 + ... + 2142156.

It is an arithmetic number, because the mean of its divisors is an integer number (2040641526).

Almost surely, 2^20996289968 is an apocalyptic number.

It is an amenable number.

20996289968 is a deficient number, since it is larger than the sum of its proper divisors (19816540552).

20996289968 is a wasteful number, since it uses less digits than its factorization.

20996289968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274804 (or 4274798 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 68.

The spelling of 20996289968 in words is "twenty billion, nine hundred ninety-six million, two hundred eighty-nine thousand, nine hundred sixty-eight".