20780762530780 has 48 divisors (see below), whose sum is σ = 49881255137280. Its totient is φ = 7123772144448.

The previous prime is 20780762530769. The next prime is 20780762530799. The reversal of 20780762530780 is 8703526708702.

It is a super-3 number, since 3×20780762530780³ (a number of 41 digits) contains 333 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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10105182 + ... + 11986501.

It is an arithmetic number, because the mean of its divisors is an integer number (1039192815360).

Almost surely, 2^{20780762530780} is an apocalyptic number.

20780762530780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20780762530780 is an abundant number, since it is smaller than the sum of its proper divisors (29100492606500).

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

20780762530780 is a wasteful number, since it uses less digits than its factorization.

20780762530780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22098418 (or 22098416 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 20780762530780 in words is "twenty trillion, seven hundred eighty billion, seven hundred sixty-two million, five hundred thirty thousand, seven hundred eighty".