20655525256 has 8 divisors (see below), whose sum is σ = 38729109870. Its totient is φ = 10327762624.

The previous prime is 20655525227. The next prime is 20655525263. The reversal of 20655525256 is 65252555602.

It can be written as a sum of positive squares in only one way, i.e., 19025788356 + 1629736900 = 137934^2 + 40370^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290970321 + ... + 1290970336.

Almost surely, 2^20655525256 is an apocalyptic number.

It is an amenable number.

20655525256 is a deficient number, since it is larger than the sum of its proper divisors (18073584614).

20655525256 is a wasteful number, since it uses less digits than its factorization.

20655525256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581940663 (or 2581940659 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 43.

The spelling of 20655525256 in words is "twenty billion, six hundred fifty-five million, five hundred twenty-five thousand, two hundred fifty-six".