20971724968 has 32 divisors (see below), whose sum is σ = 40143600000. Its totient is φ = 10268749120.

The previous prime is 20971724953. The next prime is 20971724971. The reversal of 20971724968 is 86942717902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39268 + ... + 208531.

It is an arithmetic number, because the mean of its divisors is an integer number (1254487500).

Almost surely, 2^20971724968 is an apocalyptic number.

It is an amenable number.

20971724968 is a deficient number, since it is larger than the sum of its proper divisors (19171875032).

20971724968 is a wasteful number, since it uses less digits than its factorization.

20971724968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248025 (or 248021 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 20971724968 in words is "twenty billion, nine hundred seventy-one million, seven hundred twenty-four thousand, nine hundred sixty-eight".