20072717 has 16 divisors (see below), whose sum is σ = 23841792. Its totient is φ = 16536960.

The previous prime is 20072711. The next prime is 20072729. The reversal of 20072717 is 71727002.

It is a cyclic number.

It is not a de Polignac number, because 20072717 - 2¹⁰ = 20071693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20072711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50363 + ... + 50759.

It is an arithmetic number, because the mean of its divisors is an integer number (1490112).

Almost surely, 2^20072717 is an apocalyptic number.

It is an amenable number.

20072717 is a deficient number, since it is larger than the sum of its proper divisors (3769075).

20072717 is a wasteful number, since it uses less digits than its factorization.

20072717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 20072717 is about 4480.2585862872. The cubic root of 20072717 is about 271.7703376061.

Adding to 20072717 its reverse (71727002), we get a palindrome (91799719).

The spelling of 20072717 in words is "twenty million, seventy-two thousand, seven hundred seventeen".