20042589 has 8 divisors (see below), whose sum is σ = 30541120. Its totient is φ = 11452896.

The previous prime is 20042579. The next prime is 20042597. The reversal of 20042589 is 98524002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20042589 - 2⁴ = 20042573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477184 + ... + 477225.

It is an arithmetic number, because the mean of its divisors is an integer number (3817640).

Almost surely, 2^20042589 is an apocalyptic number.

It is an amenable number.

20042589 is a deficient number, since it is larger than the sum of its proper divisors (10498531).

20042589 is an equidigital number, since it uses as much as digits as its factorization.

20042589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954419.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20042589 is about 4476.8950177551. The cubic root of 20042589 is about 271.6342989444.

The spelling of 20042589 in words is "twenty million, forty-two thousand, five hundred eighty-nine".