20474317 has 2 divisors, whose sum is σ = 20474318. Its totient is φ = 20474316.

The previous prime is 20474309. The next prime is 20474359. The reversal of 20474317 is 71347402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12823561 + 7650756 = 3581^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 20474317 - 2³ = 20474309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20474017) 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, 10237158 + 10237159.

It is an arithmetic number, because the mean of its divisors is an integer number (10237159).

Almost surely, 2^20474317 is an apocalyptic number.

It is an amenable number.

20474317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20474317 is an equidigital number, since it uses as much as digits as its factorization.

20474317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 20474317 is about 4524.8554673050. The cubic root of 20474317 is about 273.5708423737.

The spelling of 20474317 in words is "twenty million, four hundred seventy-four thousand, three hundred seventeen".