20245617 has 12 divisors (see below), whose sum is σ = 33421440. Its totient is φ = 11568888.

The previous prime is 20245607. The next prime is 20245619. The reversal of 20245617 is 71654202.

20245617 is a `hidden beast` number, since 2 + 0 + 2 + 45 + 617 = 666.

20245617 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 20245617 - 2⁶ = 20245553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20245619) 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 11 ways as a sum of consecutive naturals, for example, 160617 + ... + 160742.

It is an arithmetic number, because the mean of its divisors is an integer number (2785120).

Almost surely, 2^20245617 is an apocalyptic number.

It is an amenable number.

20245617 is a deficient number, since it is larger than the sum of its proper divisors (13175823).

20245617 is a wasteful number, since it uses less digits than its factorization.

20245617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321372 (or 321369 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20245617 is about 4499.5129736450. The cubic root of 20245617 is about 272.5484222230.

Adding to 20245617 its reverse (71654202), we get a palindrome (91899819).

The spelling of 20245617 in words is "twenty million, two hundred forty-five thousand, six hundred seventeen".