20285975365 has 4 divisors (see below), whose sum is σ = 24343170444. Its totient is φ = 16228780288.

The previous prime is 20285975363. The next prime is 20285975419. The reversal of 20285975365 is 56357958202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11244057444 + 9041917921 = 106038^2 + 95089^2 .

It is a cyclic number.

It is not a de Polignac number, because 20285975365 - 2¹ = 20285975363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285975363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028597532 + ... + 2028597541.

It is an arithmetic number, because the mean of its divisors is an integer number (6085792611).

Almost surely, 2^20285975365 is an apocalyptic number.

It is an amenable number.

20285975365 is a deficient number, since it is larger than the sum of its proper divisors (4057195079).

20285975365 is an equidigital number, since it uses as much as digits as its factorization.

20285975365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057195078.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 20285975365 in words is "twenty billion, two hundred eighty-five million, nine hundred seventy-five thousand, three hundred sixty-five".