20464417 has 2 divisors, whose sum is σ = 20464418. Its totient is φ = 20464416.

The previous prime is 20464391. The next prime is 20464421. The reversal of 20464417 is 71446402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10504081 + 9960336 = 3241^2 + 3156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20464417 is a prime.

It is a Chen prime.

It is equal to p_1298134 and since 20464417 and 1298134 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 (20464217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10232208 + 10232209.

It is an arithmetic number, because the mean of its divisors is an integer number (10232209).

Almost surely, 2^20464417 is an apocalyptic number.

It is an amenable number.

20464417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20464417 is an equidigital number, since it uses as much as digits as its factorization.

20464417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20464417 is about 4523.7613774380. The cubic root of 20464417 is about 273.5267417902.

The spelling of 20464417 in words is "twenty million, four hundred sixty-four thousand, four hundred seventeen".