20605463 has 2 divisors, whose sum is σ = 20605464. Its totient is φ = 20605462.

The previous prime is 20605397. The next prime is 20605477. The reversal of 20605463 is 36450602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20605463 - 2¹² = 20601367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20605763) 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, 10302731 + 10302732.

It is an arithmetic number, because the mean of its divisors is an integer number (10302732).

Almost surely, 2^20605463 is an apocalyptic number.

20605463 is a deficient number, since it is larger than the sum of its proper divisors (1).

20605463 is an equidigital number, since it uses as much as digits as its factorization.

20605463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 20605463 is about 4539.3240686252. The cubic root of 20605463 is about 274.1537090212.

The spelling of 20605463 in words is "twenty million, six hundred five thousand, four hundred sixty-three".