20488011728 has 10 divisors (see below), whose sum is σ = 39695522754. Its totient is φ = 10244005856.

The previous prime is 20488011671. The next prime is 20488011743. The reversal of 20488011728 is 82711088402.

It can be written as a sum of positive squares in only one way, i.e., 20416980544 + 71031184 = 142888^2 + 8428^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640250351 + ... + 640250382.

Almost surely, 2^20488011728 is an apocalyptic number.

It is an amenable number.

20488011728 is a deficient number, since it is larger than the sum of its proper divisors (19207511026).

20488011728 is a wasteful number, since it uses less digits than its factorization.

20488011728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280500741 (or 1280500735 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 41.

The spelling of 20488011728 in words is "twenty billion, four hundred eighty-eight million, eleven thousand, seven hundred twenty-eight".