20803089 has 4 divisors (see below), whose sum is σ = 27737456. Its totient is φ = 13868724.

The previous prime is 20803067. The next prime is 20803091. The reversal of 20803089 is 98030802.

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 20803089 - 2¹² = 20798993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20803789) 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, 3467179 + ... + 3467184.

It is an arithmetic number, because the mean of its divisors is an integer number (6934364).

Almost surely, 2^20803089 is an apocalyptic number.

It is an amenable number.

20803089 is a deficient number, since it is larger than the sum of its proper divisors (6934367).

20803089 is an equidigital number, since it uses as much as digits as its factorization.

20803089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6934366.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20803089 is about 4561.0403418518. The cubic root of 20803089 is about 275.0273868042.

The spelling of 20803089 in words is "twenty million, eight hundred three thousand, eighty-nine".