20765284585 has 16 divisors (see below), whose sum is σ = 26839834560. Its totient is φ = 15371899200.

The previous prime is 20765284583. The next prime is 20765284597. The reversal of 20765284585 is 58548256702.

It is not a de Polignac number, because 20765284585 - 2¹ = 20765284583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20765284583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2537566 + ... + 2545735.

It is an arithmetic number, because the mean of its divisors is an integer number (1677489660).

Almost surely, 2^20765284585 is an apocalyptic number.

It is an amenable number.

20765284585 is a deficient number, since it is larger than the sum of its proper divisors (6074549975).

20765284585 is a wasteful number, since it uses less digits than its factorization.

20765284585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083368.

The product of its (nonzero) digits is 5376000, while the sum is 52.

The spelling of 20765284585 in words is "twenty billion, seven hundred sixty-five million, two hundred eighty-four thousand, five hundred eighty-five".