20487961361328 has 80 divisors (see below), whose sum is σ = 52963358803680. Its totient is φ = 6824660355072.

The previous prime is 20487961361281. The next prime is 20487961361339. The reversal of 20487961361328 is 82316316978402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711546100 + ... + 711574892.

It is an arithmetic number, because the mean of its divisors is an integer number (662041985046).

Almost surely, 2^{20487961361328} is an apocalyptic number.

It is an amenable number.

20487961361328 is an abundant number, since it is smaller than the sum of its proper divisors (32475397442352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20487961361328 is a wasteful number, since it uses less digits than its factorization.

20487961361328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38406 (or 38400 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 20487961361328 in words is "twenty trillion, four hundred eighty-seven billion, nine hundred sixty-one million, three hundred sixty-one thousand, three hundred twenty-eight".