20052565 has 8 divisors (see below), whose sum is σ = 25914168. Its totient is φ = 14808000.

The previous prime is 20052559. The next prime is 20052583. The reversal of 20052565 is 56525002.

It can be written as a sum of positive squares in 4 ways, for example, as 2937796 + 17114769 = 1714^2 + 4137^2 .

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

It is not a de Polignac number, because 20052565 - 2⁷ = 20052437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154186 + ... + 154315.

It is an arithmetic number, because the mean of its divisors is an integer number (3239271).

Almost surely, 2^20052565 is an apocalyptic number.

It is an amenable number.

20052565 is a deficient number, since it is larger than the sum of its proper divisors (5861603).

20052565 is a wasteful number, since it uses less digits than its factorization.

20052565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308519.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 20052565 is about 4478.0090442070. The cubic root of 20052565 is about 271.6793592290.

Adding to 20052565 its reverse (56525002), we get a palindrome (76577567).

The spelling of 20052565 in words is "twenty million, fifty-two thousand, five hundred sixty-five".