20081089 has 8 divisors (see below), whose sum is σ = 23240960. Its totient is φ = 16994016.

The previous prime is 20081077. The next prime is 20081107. The reversal of 20081089 is 98018002.

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 20081089 - 2⁵ = 20081057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20085089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17604 + ... + 18709.

It is an arithmetic number, because the mean of its divisors is an integer number (2905120).

Almost surely, 2^20081089 is an apocalyptic number.

It is an amenable number.

20081089 is a deficient number, since it is larger than the sum of its proper divisors (3159871).

20081089 is an equidigital number, since it uses as much as digits as its factorization.

20081089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36399.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 20081089 is about 4481.1928099558. The cubic root of 20081089 is about 271.8081159998.

The spelling of 20081089 in words is "twenty million, eighty-one thousand, eighty-nine".