20686447675325 has 12 divisors (see below), whose sum is σ = 25651359297588. Its totient is φ = 16549052217600.

The previous prime is 20686447675241. The next prime is 20686447675337. The reversal of 20686447675325 is 52357674468602.

It can be written as a sum of positive squares in 6 ways, for example, as 3285819658489 + 17400628016836 = 1812683^2 + 4171406^2 .

It is not a de Polignac number, because 20686447675325 - 2¹⁰ = 20686447674301 is a prime.

It is a super-2 number, since 2×20686447675325² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1461029 + ... + 6596021.

It is an arithmetic number, because the mean of its divisors is an integer number (2137613274799).

Almost surely, 2^{20686447675325} is an apocalyptic number.

20686447675325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20686447675325 is a deficient number, since it is larger than the sum of its proper divisors (4964911622263).

20686447675325 is a wasteful number, since it uses less digits than its factorization.

20686447675325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5296144 (or 5296139 counting only the distinct ones).

The product of its (nonzero) digits is 406425600, while the sum is 65.

The spelling of 20686447675325 in words is "twenty trillion, six hundred eighty-six billion, four hundred forty-seven million, six hundred seventy-five thousand, three hundred twenty-five".