20389359 has 4 divisors (see below), whose sum is σ = 27185816. Its totient is φ = 13592904.

The previous prime is 20389357. The next prime is 20389363. The reversal of 20389359 is 95398302.

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

It is not a de Polignac number, because 20389359 - 2¹ = 20389357 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 (20389357) 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, 3398224 + ... + 3398229.

It is an arithmetic number, because the mean of its divisors is an integer number (6796454).

Almost surely, 2^20389359 is an apocalyptic number.

20389359 is a deficient number, since it is larger than the sum of its proper divisors (6796457).

20389359 is an equidigital number, since it uses as much as digits as its factorization.

20389359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6796456.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 20389359 is about 4515.4577841012. The cubic root of 20389359 is about 273.1919245084.

The spelling of 20389359 in words is "twenty million, three hundred eighty-nine thousand, three hundred fifty-nine".