20606717 has 4 divisors (see below), whose sum is σ = 20618976. Its totient is φ = 20594460.

The previous prime is 20606713. The next prime is 20606731. The reversal of 20606717 is 71760602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20606717 - 2² = 20606713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20606717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113 + ... + 7134.

It is an arithmetic number, because the mean of its divisors is an integer number (5154744).

Almost surely, 2^20606717 is an apocalyptic number.

It is an amenable number.

20606717 is a deficient number, since it is larger than the sum of its proper divisors (12259).

20606717 is a wasteful number, since it uses less digits than its factorization.

20606717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12258.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20606717 is about 4539.4621928154. The cubic root of 20606717 is about 274.1592703582.

The spelling of 20606717 in words is "twenty million, six hundred six thousand, seven hundred seventeen".