20380559 has 8 divisors (see below), whose sum is σ = 21510000. Its totient is φ = 19256832.

The previous prime is 20380543. The next prime is 20380561. The reversal of 20380559 is 95508302.

It is a happy number.

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 20380559 - 2⁴ = 20380543 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 (20380589) 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 7 ways as a sum of consecutive naturals, for example, 7337 + ... + 9725.

It is an arithmetic number, because the mean of its divisors is an integer number (2688750).

Almost surely, 2^20380559 is an apocalyptic number.

20380559 is a deficient number, since it is larger than the sum of its proper divisors (1129441).

20380559 is a wasteful number, since it uses less digits than its factorization.

20380559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 20380559 is about 4514.4832483907. The cubic root of 20380559 is about 273.1526158526.

The spelling of 20380559 in words is "twenty million, three hundred eighty thousand, five hundred fifty-nine".