20026617 has 16 divisors (see below), whose sum is σ = 29749440. Its totient is φ = 11898432.

The previous prime is 20026613. The next prime is 20026619. The reversal of 20026617 is 71662002.

It is a happy number.

It is not a de Polignac number, because 20026617 - 2² = 20026613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20026613) 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 15 ways as a sum of consecutive naturals, for example, 7723 + ... + 9984.

It is an arithmetic number, because the mean of its divisors is an integer number (1859340).

Almost surely, 2^20026617 is an apocalyptic number.

It is an amenable number.

20026617 is a deficient number, since it is larger than the sum of its proper divisors (9722823).

20026617 is a wasteful number, since it uses less digits than its factorization.

20026617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17752.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20026617 is about 4475.1108366162. The cubic root of 20026617 is about 271.5621243699.

Adding to 20026617 its reverse (71662002), we get a palindrome (91688619).

The spelling of 20026617 in words is "twenty million, twenty-six thousand, six hundred seventeen".