20342589 has 4 divisors (see below), whose sum is σ = 27123456. Its totient is φ = 13561724.

The previous prime is 20342573. The next prime is 20342611. The reversal of 20342589 is 98524302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20342589 - 2⁴ = 20342573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342389) 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, 3390429 + ... + 3390434.

It is an arithmetic number, because the mean of its divisors is an integer number (6780864).

Almost surely, 2^20342589 is an apocalyptic number.

It is an amenable number.

20342589 is a deficient number, since it is larger than the sum of its proper divisors (6780867).

20342589 is an equidigital number, since it uses as much as digits as its factorization.

20342589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780866.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 20342589 is about 4510.2759339091. The cubic root of 20342589 is about 272.9828780739.

The spelling of 20342589 in words is "twenty million, three hundred forty-two thousand, five hundred eighty-nine".