20805941758680 has 96 divisors (see below), whose sum is σ = 72820796171760. Its totient is φ = 5121462585600.

The previous prime is 20805941758661. The next prime is 20805941758739. The reversal of 20805941758680 is 8685714950802.

20805941758680 is a `hidden beast` number, since 2 + 0 + 8 + 0 + 5 + 9 + 41 + 7 + 586 + 8 + 0 = 666.

It is a super-2 number, since 2×20805941758680² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2222852346 + ... + 2222861705.

Almost surely, 2^{20805941758680} is an apocalyptic number.

20805941758680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20805941758680 is an abundant number, since it is smaller than the sum of its proper divisors (52014854413080).

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

20805941758680 is a wasteful number, since it uses less digits than its factorization.

20805941758680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445714081 (or 4445714074 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 63.

The spelling of 20805941758680 in words is "twenty trillion, eight hundred five billion, nine hundred forty-one million, seven hundred fifty-eight thousand, six hundred eighty".