20681949913794 has 48 divisors (see below), whose sum is σ = 48310394932800. Its totient is φ = 6356752263648.

The previous prime is 20681949913771. The next prime is 20681949913847. The reversal of 20681949913794 is 49731994918602.

20681949913794 is a `hidden beast` number, since 2 + 0 + 6 + 8 + 19 + 499 + 1 + 37 + 94 = 666.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47872224 + ... + 48302315.

It is an arithmetic number, because the mean of its divisors is an integer number (1006466561100).

Almost surely, 2^{20681949913794} is an apocalyptic number.

20681949913794 is an abundant number, since it is smaller than the sum of its proper divisors (27628445019006).

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

20681949913794 is a wasteful number, since it uses less digits than its factorization.

20681949913794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96175479 (or 96175476 counting only the distinct ones).

The product of its (nonzero) digits is 211631616, while the sum is 72.

The spelling of 20681949913794 in words is "twenty trillion, six hundred eighty-one billion, nine hundred forty-nine million, nine hundred thirteen thousand, seven hundred ninety-four".