20086409 has 8 divisors (see below), whose sum is σ = 23022720. Its totient is φ = 17166816.

The previous prime is 20086403. The next prime is 20086421. The reversal of 20086409 is 90468002.

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 20086409 - 2⁴ = 20086393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20086403) 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, 1484 + ... + 6509.

It is an arithmetic number, because the mean of its divisors is an integer number (2877840).

Almost surely, 2^20086409 is an apocalyptic number.

It is an amenable number.

20086409 is a deficient number, since it is larger than the sum of its proper divisors (2936311).

20086409 is an equidigital number, since it uses as much as digits as its factorization.

20086409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8359.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20086409 is about 4481.7863626014. The cubic root of 20086409 is about 271.8321168810.

The spelling of 20086409 in words is "twenty million, eighty-six thousand, four hundred nine".