20136217 has 2 divisors, whose sum is σ = 20136218. Its totient is φ = 20136216.

The previous prime is 20136197. The next prime is 20136227. The reversal of 20136217 is 71263102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13039321 + 7096896 = 3611^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 20136217 - 2⁷ = 20136089 is a prime.

It is not a weakly prime, because it can be changed into another prime (20136227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10068108 + 10068109.

It is an arithmetic number, because the mean of its divisors is an integer number (10068109).

Almost surely, 2^20136217 is an apocalyptic number.

It is an amenable number.

20136217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20136217 is an equidigital number, since it uses as much as digits as its factorization.

20136217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20136217 is about 4487.3396350176. The cubic root of 20136217 is about 272.0566175754.

Adding to 20136217 its reverse (71263102), we get a palindrome (91399319).

The spelling of 20136217 in words is "twenty million, one hundred thirty-six thousand, two hundred seventeen".