20527557621608 has 16 divisors (see below), whose sum is σ = 38842282198500. Its totient is φ = 10169615702016.

The previous prime is 20527557621553. The next prime is 20527557621677. The reversal of 20527557621608 is 80612675572502.

It can be written as a sum of positive squares in 2 ways, for example, as 19654308489124 + 873249132484 = 4433318^2 + 934478^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11770387673 + ... + 11770389416.

Almost surely, 2^{20527557621608} is an apocalyptic number.

It is an amenable number.

20527557621608 is a deficient number, since it is larger than the sum of its proper divisors (18314724576892).

20527557621608 is a wasteful number, since it uses less digits than its factorization.

20527557621608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23540777204 (or 23540777200 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 56.

The spelling of 20527557621608 in words is "twenty trillion, five hundred twenty-seven billion, five hundred fifty-seven million, six hundred twenty-one thousand, six hundred eight".