20252417 has 4 divisors (see below), whose sum is σ = 20288580. Its totient is φ = 20216256.

The previous prime is 20252381. The next prime is 20252447. The reversal of 20252417 is 71425202.

It is a happy number.

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 2070721 + 18181696 = 1439^2 + 4264^2 .

It is a cyclic number.

It is not a de Polignac number, because 20252417 - 2¹⁰ = 20251393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20252392 and 20252401.

It is not an unprimeable number, because it can be changed into a prime (20252447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17228 + ... + 18365.

It is an arithmetic number, because the mean of its divisors is an integer number (5072145).

Almost surely, 2^20252417 is an apocalyptic number.

It is an amenable number.

20252417 is a deficient number, since it is larger than the sum of its proper divisors (36163).

20252417 is an equidigital number, since it uses as much as digits as its factorization.

20252417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36162.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 20252417 is about 4500.2685475425. The cubic root of 20252417 is about 272.5789328896.

Adding to 20252417 its reverse (71425202), we get a palindrome (91677619).

The spelling of 20252417 in words is "twenty million, two hundred fifty-two thousand, four hundred seventeen".