20243117 has 2 divisors, whose sum is σ = 20243118. Its totient is φ = 20243116.

The previous prime is 20243101. The next prime is 20243137. The reversal of 20243117 is 71134202.

It is an a-pointer prime, because the next prime (20243137) can be obtained adding 20243117 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20241001 + 2116 = 4499^2 + 46^2 .

It is a cyclic number.

It is not a de Polignac number, because 20243117 - 2⁴ = 20243101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20243137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10121558 + 10121559.

It is an arithmetic number, because the mean of its divisors is an integer number (10121559).

Almost surely, 2^20243117 is an apocalyptic number.

It is an amenable number.

20243117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20243117 is an equidigital number, since it uses as much as digits as its factorization.

20243117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 20243117 is about 4499.2351572239. The cubic root of 20243117 is about 272.5372033486.

Adding to 20243117 its reverse (71134202), we get a palindrome (91377319).

The spelling of 20243117 in words is "twenty million, two hundred forty-three thousand, one hundred seventeen".