20578127056 has 10 divisors (see below), whose sum is σ = 39870121202. Its totient is φ = 10289063520.

The previous prime is 20578127041. The next prime is 20578127069. The reversal of 20578127056 is 65072187502.

It can be written as a sum of positive squares in only one way, i.e., 17540353600 + 3037773456 = 132440^2 + 55116^2 .

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, 643066455 + ... + 643066486.

Almost surely, 2^20578127056 is an apocalyptic number.

It is an amenable number.

20578127056 is a deficient number, since it is larger than the sum of its proper divisors (19291994146).

20578127056 is a wasteful number, since it uses less digits than its factorization.

20578127056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286132949 (or 1286132943 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 20578127056 in words is "twenty billion, five hundred seventy-eight million, one hundred twenty-seven thousand, fifty-six".