20589943 has 4 divisors (see below), whose sum is σ = 22461768. Its totient is φ = 18718120.

The previous prime is 20589937. The next prime is 20589949. The reversal of 20589943 is 34998502.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20589937) and next prime (20589949).

It is a cyclic number.

It is not a de Polignac number, because 20589943 - 2⁵ = 20589911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20589896 and 20589905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20589949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935896 + ... + 935917.

It is an arithmetic number, because the mean of its divisors is an integer number (5615442).

Almost surely, 2^20589943 is an apocalyptic number.

20589943 is a deficient number, since it is larger than the sum of its proper divisors (1871825).

20589943 is a wasteful number, since it uses less digits than its factorization.

20589943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871824.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 20589943 is about 4537.6142409861. The cubic root of 20589943 is about 274.0848610290.

The spelling of 20589943 in words is "twenty million, five hundred eighty-nine thousand, nine hundred forty-three".