20478320288 has 24 divisors (see below), whose sum is σ = 40732335252. Its totient is φ = 10133600256.

The previous prime is 20478320281. The next prime is 20478320323. The reversal of 20478320288 is 88202387402.

It can be written as a sum of positive squares in 2 ways, for example, as 20475320464 + 2999824 = 143092^2 + 1732^2 .

It is not an unprimeable number, because it can be changed into a prime (20478320281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3295595 + ... + 3301802.

Almost surely, 2^20478320288 is an apocalyptic number.

It is an amenable number.

20478320288 is a deficient number, since it is larger than the sum of its proper divisors (20254014964).

20478320288 is an equidigital number, since it uses as much as digits as its factorization.

20478320288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6597504 (or 6597496 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 44.

The spelling of 20478320288 in words is "twenty billion, four hundred seventy-eight million, three hundred twenty thousand, two hundred eighty-eight".