20780762530779 has 24 divisors (see below), whose sum is σ = 30525724382400. Its totient is φ = 13618892283120.

The previous prime is 20780762530769. The next prime is 20780762530799. The reversal of 20780762530779 is 97703526708702.

20780762530779 is a `hidden beast` number, since 20 + 7 + 8 + 0 + 7 + 6 + 2 + 530 + 7 + 79 = 666.

It is not a de Polignac number, because 20780762530779 - 2⁵ = 20780762530747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20780762530769) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93946092 + ... + 94167030.

It is an arithmetic number, because the mean of its divisors is an integer number (1271905182600).

Almost surely, 2^{20780762530779} is an apocalyptic number.

20780762530779 is a deficient number, since it is larger than the sum of its proper divisors (9744961851621).

20780762530779 is a wasteful number, since it uses less digits than its factorization.

20780762530779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398135 (or 398132 counting only the distinct ones).

The product of its (nonzero) digits is 62233920, while the sum is 63.

The spelling of 20780762530779 in words is "twenty trillion, seven hundred eighty billion, seven hundred sixty-two million, five hundred thirty thousand, seven hundred seventy-nine".