20775660587 has 8 divisors (see below), whose sum is σ = 22669380912. Its totient is φ = 18882777600.

The previous prime is 20775660517. The next prime is 20775660601. The reversal of 20775660587 is 78506657702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20775660587 - 2¹⁶ = 20775595051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20775660517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156878 + ... + 257219.

It is an arithmetic number, because the mean of its divisors is an integer number (2833672614).

Almost surely, 2^20775660587 is an apocalyptic number.

20775660587 is a deficient number, since it is larger than the sum of its proper divisors (1893720325).

20775660587 is a wasteful number, since it uses less digits than its factorization.

20775660587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418669.

The product of its (nonzero) digits is 4939200, while the sum is 53.

The spelling of 20775660587 in words is "twenty billion, seven hundred seventy-five million, six hundred sixty thousand, five hundred eighty-seven".