20680538427396 has 81 divisors (see below), whose sum is σ = 52420978612821. Its totient is φ = 6874422043104.

The previous prime is 20680538427391. The next prime is 20680538427397. The reversal of 20680538427396 is 69372483508602.

It is a happy number.

The square root of 20680538427396 is 4547586.

It is a perfect power (a square), and thus also a powerful number.

20680538427396 is a `hidden beast` number, since 2 + 0 + 6 + 8 + 0 + 538 + 4 + 2 + 7 + 3 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 626836392900 + 20053702034496 = 791730^2 + 4478136^2 .

It is not an unprimeable number, because it can be changed into a prime (20680538427391) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12633193090 + ... + 12633194726.

Almost surely, 2^{20680538427396} is an apocalyptic number.

20680538427396 is the 4547586-th square number.

It is an amenable number.

20680538427396 is an abundant number, since it is smaller than the sum of its proper divisors (31740440185425).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20680538427396 is an frugal number, since it uses more digits than its factorization.

20680538427396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210 (or 2105 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 63.

The spelling of 20680538427396 in words is "twenty trillion, six hundred eighty billion, five hundred thirty-eight million, four hundred twenty-seven thousand, three hundred ninety-six".