20656304675 has 12 divisors (see below), whose sum is σ = 25635877800. Its totient is φ = 16510811520.

The previous prime is 20656304671. The next prime is 20656304693. The reversal of 20656304675 is 57640365602.

It is a happy number.

It is not a de Polignac number, because 20656304675 - 2² = 20656304671 is a prime.

It is a super-5 number, since 5×20656304675⁵ (a number of 53 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (20656304671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 326150 + ... + 384299.

It is an arithmetic number, because the mean of its divisors is an integer number (2136323150).

Almost surely, 2^20656304675 is an apocalyptic number.

20656304675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20656304675 is a deficient number, since it is larger than the sum of its proper divisors (4979573125).

20656304675 is a wasteful number, since it uses less digits than its factorization.

20656304675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711622 (or 711617 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 20656304675 in words is "twenty billion, six hundred fifty-six million, three hundred four thousand, six hundred seventy-five".