20641703 has 4 divisors (see below), whose sum is σ = 20730528. Its totient is φ = 20552880.

The previous prime is 20641679. The next prime is 20641717. The reversal of 20641703 is 30714602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20641703 - 2¹⁰ = 20640679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44063 + ... + 44528.

It is an arithmetic number, because the mean of its divisors is an integer number (5182632).

Almost surely, 2^20641703 is an apocalyptic number.

20641703 is a deficient number, since it is larger than the sum of its proper divisors (88825).

20641703 is an equidigital number, since it uses as much as digits as its factorization.

20641703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88824.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20641703 is about 4543.3140987609. The cubic root of 20641703 is about 274.3143381302.

The spelling of 20641703 in words is "twenty million, six hundred forty-one thousand, seven hundred three".