20172007 has 2 divisors, whose sum is σ = 20172008. Its totient is φ = 20172006.

The previous prime is 20172001. The next prime is 20172037. The reversal of 20172007 is 70027102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20172007 - 2¹¹ = 20169959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20172001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10086003 + 10086004.

It is an arithmetic number, because the mean of its divisors is an integer number (10086004).

Almost surely, 2^20172007 is an apocalyptic number.

20172007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20172007 is an equidigital number, since it uses as much as digits as its factorization.

20172007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 20172007 is about 4491.3257508224. The cubic root of 20172007 is about 272.2177061463.

Adding to 20172007 its reverse (70027102), we get a palindrome (90199109).

The spelling of 20172007 in words is "twenty million, one hundred seventy-two thousand, seven".