20686615830112 has 24 divisors (see below), whose sum is σ = 40726896733656. Its totient is φ = 10343276977152.

The previous prime is 20686615830091. The next prime is 20686615830113. The reversal of 20686615830112 is 21103851668602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20686615830113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13005168 + ... + 14508880.

It is an arithmetic number, because the mean of its divisors is an integer number (1696954030569).

Almost surely, 2^{20686615830112} is an apocalyptic number.

It is an amenable number.

20686615830112 is a deficient number, since it is larger than the sum of its proper divisors (20040280903544).

20686615830112 is a wasteful number, since it uses less digits than its factorization.

20686615830112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933630 (or 1933622 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 20686615830112 in words is "twenty trillion, six hundred eighty-six billion, six hundred fifteen million, eight hundred thirty thousand, one hundred twelve".