20052617 has 4 divisors (see below), whose sum is σ = 21595140. Its totient is φ = 18510096.

The previous prime is 20052587. The next prime is 20052623. The reversal of 20052617 is 71625002.

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 3924361 + 16128256 = 1981^2 + 4016^2 .

It is a cyclic number.

It is not a de Polignac number, because 20052617 - 2¹² = 20048521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20052592 and 20052601.

It is not an unprimeable number, because it can be changed into a prime (20052667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771242 + ... + 771267.

It is an arithmetic number, because the mean of its divisors is an integer number (5398785).

Almost surely, 2^20052617 is an apocalyptic number.

It is an amenable number.

20052617 is a deficient number, since it is larger than the sum of its proper divisors (1542523).

20052617 is a wasteful number, since it uses less digits than its factorization.

20052617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542522.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20052617 is about 4478.0148503550. The cubic root of 20052617 is about 271.6795940670.

Adding to 20052617 its reverse (71625002), we get a palindrome (91677619).

The spelling of 20052617 in words is "twenty million, fifty-two thousand, six hundred seventeen".