20781348935796 has 36 divisors (see below), whose sum is σ = 54814572557472. Its totient is φ = 6625937341584.

The previous prime is 20781348935759. The next prime is 20781348935807. The reversal of 20781348935796 is 69753984318702.

20781348935796 is a `hidden beast` number, since 2 + 0 + 7 + 8 + 1 + 3 + 48 + 9 + 3 + 579 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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, 12549122926 + ... + 12549124581.

It is a 1-persistent number, because it is pandigital, but 2⋅20781348935796 = 41562697871592 is not.

Almost surely, 2^{20781348935796} is an apocalyptic number.

It is an amenable number.

20781348935796 is an abundant number, since it is smaller than the sum of its proper divisors (34033223621676).

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

20781348935796 is a wasteful number, since it uses less digits than its factorization.

20781348935796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25098247540 (or 25098247535 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 72.

The spelling of 20781348935796 in words is "twenty trillion, seven hundred eighty-one billion, three hundred forty-eight million, nine hundred thirty-five thousand, seven hundred ninety-six".