20580921968 has 10 divisors (see below), whose sum is σ = 39875536344. Its totient is φ = 10290460976.

The previous prime is 20580921967. The next prime is 20580921971. The reversal of 20580921968 is 86912908502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20580921967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643153796 + ... + 643153827.

Almost surely, 2^20580921968 is an apocalyptic number.

It is an amenable number.

20580921968 is a deficient number, since it is larger than the sum of its proper divisors (19294614376).

20580921968 is a wasteful number, since it uses less digits than its factorization.

20580921968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286307631 (or 1286307625 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 20580921968 in words is "twenty billion, five hundred eighty million, nine hundred twenty-one thousand, nine hundred sixty-eight".