20787011682765 has 16 divisors (see below), whose sum is σ = 33273389698368. Its totient is φ = 11081682562176.

The previous prime is 20787011682739. The next prime is 20787011682803. The reversal of 20787011682765 is 56728611078702.

It is not a de Polignac number, because 20787011682765 - 2¹⁰ = 20787011681741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20787011682699 and 20787011682708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295192912 + ... + 295263321.

It is an arithmetic number, because the mean of its divisors is an integer number (2079586856148).

Almost surely, 2^{20787011682765} is an apocalyptic number.

It is an amenable number.

20787011682765 is a deficient number, since it is larger than the sum of its proper divisors (12486378015603).

20787011682765 is a wasteful number, since it uses less digits than its factorization.

20787011682765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590458588.

The product of its (nonzero) digits is 15805440, while the sum is 60.

The spelling of 20787011682765 in words is "twenty trillion, seven hundred eighty-seven billion, eleven million, six hundred eighty-two thousand, seven hundred sixty-five".