20775473587 has 8 divisors (see below), whose sum is σ = 22723957440. Its totient is φ = 18836957160.

The previous prime is 20775473569. The next prime is 20775473651. The reversal of 20775473587 is 78537457702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20775473587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20775473507) 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, 2487493 + ... + 2495830.

It is an arithmetic number, because the mean of its divisors is an integer number (2840494680).

Almost surely, 2^20775473587 is an apocalyptic number.

20775473587 is a deficient number, since it is larger than the sum of its proper divisors (1948483853).

20775473587 is a wasteful number, since it uses less digits than its factorization.

20775473587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983713.

The product of its (nonzero) digits is 11524800, while the sum is 55.

The spelling of 20775473587 in words is "twenty billion, seven hundred seventy-five million, four hundred seventy-three thousand, five hundred eighty-seven".