20880089 has 4 divisors (see below), whose sum is σ = 20924160. Its totient is φ = 20836020.

The previous prime is 20880077. The next prime is 20880103. The reversal of 20880089 is 98008802.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20880089 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 (20880289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21317 + ... + 22274.

It is an arithmetic number, because the mean of its divisors is an integer number (5231040).

Almost surely, 2^20880089 is an apocalyptic number.

It is an amenable number.

20880089 is a deficient number, since it is larger than the sum of its proper divisors (44071).

20880089 is an equidigital number, since it uses as much as digits as its factorization.

20880089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44070.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 20880089 is about 4569.4736020684. The cubic root of 20880089 is about 275.3662953552.

The spelling of 20880089 in words is "twenty million, eight hundred eighty thousand, eighty-nine".