20798089 has 8 divisors (see below), whose sum is σ = 23715720. Its totient is φ = 18068736.

The previous prime is 20798083. The next prime is 20798119. The reversal of 20798089 is 98089702.

It can be written as a sum of positive squares in 4 ways, for example, as 4489 + 20793600 = 67^2 + 4560^2 .

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 20798089 - 2³ = 20798081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20798081) 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, 46834 + ... + 47275.

It is an arithmetic number, because the mean of its divisors is an integer number (2964465).

Almost surely, 2^20798089 is an apocalyptic number.

It is an amenable number.

20798089 is a deficient number, since it is larger than the sum of its proper divisors (2917631).

20798089 is a wasteful number, since it uses less digits than its factorization.

20798089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94139.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 20798089 is about 4560.4921883498. The cubic root of 20798089 is about 275.0053508601.

The spelling of 20798089 in words is "twenty million, seven hundred ninety-eight thousand, eighty-nine".