20496009 has 4 divisors (see below), whose sum is σ = 27328016. Its totient is φ = 13664004.

The previous prime is 20495987. The next prime is 20496017. The reversal of 20496009 is 90069402.

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 not a de Polignac number, because 20496009 - 2¹¹ = 20493961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20496709) 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 3 ways as a sum of consecutive naturals, for example, 3415999 + ... + 3416004.

It is an arithmetic number, because the mean of its divisors is an integer number (6832004).

Almost surely, 2^20496009 is an apocalyptic number.

It is an amenable number.

20496009 is a deficient number, since it is larger than the sum of its proper divisors (6832007).

20496009 is an equidigital number, since it uses as much as digits as its factorization.

20496009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832006.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20496009 is about 4527.2518153953. The cubic root of 20496009 is about 273.6674219764.

The spelling of 20496009 in words is "twenty million, four hundred ninety-six thousand, nine".