20686726562120 has 32 divisors (see below), whose sum is σ = 49283083870200. Its totient is φ = 7787944117248.

The previous prime is 20686726562081. The next prime is 20686726562141. The reversal of 20686726562120 is 2126562768602.

It can be written as a sum of positive squares in 4 ways, for example, as 13565652852964 + 7121073709156 = 3683158^2 + 2668534^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15210827675 + ... + 15210829034.

Almost surely, 2^{20686726562120} is an apocalyptic number.

20686726562120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20686726562120 is an abundant number, since it is smaller than the sum of its proper divisors (28596357308080).

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

20686726562120 is a wasteful number, since it uses less digits than its factorization.

20686726562120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30421656737 (or 30421656733 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 20686726562120 in words is "twenty trillion, six hundred eighty-six billion, seven hundred twenty-six million, five hundred sixty-two thousand, one hundred twenty".