20488171328 has 56 divisors (see below), whose sum is σ = 40952809128. Its totient is φ = 10169542656.

The previous prime is 20488171273. The next prime is 20488171337. The reversal of 20488171328 is 82317188402.

It can be written as a sum of positive squares in 4 ways, for example, as 12667952704 + 7820218624 = 112552^2 + 88432^2 .

It is a congruent number.

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, 12100850 + ... + 12102542.

It is an arithmetic number, because the mean of its divisors is an integer number (731300163).

Almost surely, 2^20488171328 is an apocalyptic number.

It is an amenable number.

20488171328 is a deficient number, since it is larger than the sum of its proper divisors (20464637800).

20488171328 is a wasteful number, since it uses less digits than its factorization.

20488171328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971 (or 2961 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 20488171328 in words is "twenty billion, four hundred eighty-eight million, one hundred seventy-one thousand, three hundred twenty-eight".