20320089 has 16 divisors (see below), whose sum is σ = 27580800. Its totient is φ = 13305600.

The previous prime is 20320073. The next prime is 20320103. The reversal of 20320089 is 98002302.

It is not a de Polignac number, because 20320089 - 2⁴ = 20320073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20320189) 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 15 ways as a sum of consecutive naturals, for example, 60129 + ... + 60465.

It is an arithmetic number, because the mean of its divisors is an integer number (1723800).

Almost surely, 2^20320089 is an apocalyptic number.

It is an amenable number.

20320089 is a deficient number, since it is larger than the sum of its proper divisors (7260711).

20320089 is a wasteful number, since it uses less digits than its factorization.

20320089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20320089 is about 4507.7809396642. The cubic root of 20320089 is about 272.8821963522.

The spelling of 20320089 in words is "twenty million, three hundred twenty thousand, eighty-nine".