20799089 has 2 divisors, whose sum is σ = 20799090. Its totient is φ = 20799088.

The previous prime is 20799073. The next prime is 20799101. The reversal of 20799089 is 98099702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 187489 = 4540^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 20799089 - 2⁴ = 20799073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20799029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399544 + 10399545.

It is an arithmetic number, because the mean of its divisors is an integer number (10399545).

Almost surely, 2^20799089 is an apocalyptic number.

It is an amenable number.

20799089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20799089 is an equidigital number, since it uses as much as digits as its factorization.

20799089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 20799089 is about 4560.6018243210. The cubic root of 20799089 is about 275.0097583314.

The spelling of 20799089 in words is "twenty million, seven hundred ninety-nine thousand, eighty-nine".