20417339 has 2 divisors, whose sum is σ = 20417340. Its totient is φ = 20417338.

The previous prime is 20417333. The next prime is 20417359. The reversal of 20417339 is 93371402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20417339 - 2⁸ = 20417083 is a prime.

It is a Chen prime.

It is equal to p_1295354 and since 20417339 and 1295354 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20417333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10208669 + 10208670.

It is an arithmetic number, because the mean of its divisors is an integer number (10208670).

Almost surely, 2^20417339 is an apocalyptic number.

20417339 is a deficient number, since it is larger than the sum of its proper divisors (1).

20417339 is an equidigital number, since it uses as much as digits as its factorization.

20417339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20417339 is about 4518.5549681286. The cubic root of 20417339 is about 273.3168330644.

The spelling of 20417339 in words is "twenty million, four hundred seventeen thousand, three hundred thirty-nine".