20656625755 has 8 divisors (see below), whose sum is σ = 24789259152. Its totient is φ = 16524428448.

The previous prime is 20656625729. The next prime is 20656625767. The reversal of 20656625755 is 55752665602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20656625755 - 2²⁵ = 20623071323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20656625699 and 20656625708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6277 + ... + 203353.

It is an arithmetic number, because the mean of its divisors is an integer number (3098657394).

Almost surely, 2^20656625755 is an apocalyptic number.

20656625755 is a deficient number, since it is larger than the sum of its proper divisors (4132633397).

20656625755 is a wasteful number, since it uses less digits than its factorization.

20656625755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218045.

The product of its (nonzero) digits is 3780000, while the sum is 49.

The spelling of 20656625755 in words is "twenty billion, six hundred fifty-six million, six hundred twenty-five thousand, seven hundred fifty-five".