20536417 has 8 divisors (see below), whose sum is σ = 22445280. Its totient is φ = 18634560.

The previous prime is 20536393. The next prime is 20536421. The reversal of 20536417 is 71463502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20536417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20536457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5833 + ... + 8665.

It is an arithmetic number, because the mean of its divisors is an integer number (2805660).

Almost surely, 2^20536417 is an apocalyptic number.

It is an amenable number.

20536417 is a deficient number, since it is larger than the sum of its proper divisors (1908863).

20536417 is a wasteful number, since it uses less digits than its factorization.

20536417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20536417 is about 4531.7123695133. The cubic root of 20536417 is about 273.8471495506.

Adding to 20536417 its reverse (71463502), we get a palindrome (91999919).

The spelling of 20536417 in words is "twenty million, five hundred thirty-six thousand, four hundred seventeen".