20084389 has 8 divisors (see below), whose sum is σ = 21953120. Its totient is φ = 18261936.

The previous prime is 20084381. The next prime is 20084399. The reversal of 20084389 is 98348002.

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

It is a cyclic number.

It is not a de Polignac number, because 20084389 - 2³ = 20084381 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 (20084381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10659 + ... + 12400.

It is an arithmetic number, because the mean of its divisors is an integer number (2744140).

Almost surely, 2^20084389 is an apocalyptic number.

It is an amenable number.

20084389 is a deficient number, since it is larger than the sum of its proper divisors (1868731).

20084389 is a wasteful number, since it uses less digits than its factorization.

20084389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23139.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20084389 is about 4481.5610003658. The cubic root of 20084389 is about 271.8230042636.

The spelling of 20084389 in words is "twenty million, eighty-four thousand, three hundred eighty-nine".