20594477 has 2 divisors, whose sum is σ = 20594478. Its totient is φ = 20594476.

The previous prime is 20594443. The next prime is 20594479. The reversal of 20594477 is 77449502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20529961 + 64516 = 4531^2 + 254^2 .

It is a cyclic number.

It is not a de Polignac number, because 20594477 - 2⁸ = 20594221 is a prime.

Together with 20594479, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20594477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20594479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10297238 + 10297239.

It is an arithmetic number, because the mean of its divisors is an integer number (10297239).

Almost surely, 2^20594477 is an apocalyptic number.

It is an amenable number.

20594477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20594477 is an equidigital number, since it uses as much as digits as its factorization.

20594477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 20594477 is about 4538.1138152321. The cubic root of 20594477 is about 274.1049778008.

The spelling of 20594477 in words is "twenty million, five hundred ninety-four thousand, four hundred seventy-seven".