20882089 has 4 divisors (see below), whose sum is σ = 20912580. Its totient is φ = 20851600.

The previous prime is 20882087. The next prime is 20882107. The reversal of 20882089 is 98028802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8456464 + 12425625 = 2908^2 + 3525^2 .

It is a cyclic number.

It is not a de Polignac number, because 20882089 - 2¹ = 20882087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20882087) 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 3 ways as a sum of consecutive naturals, for example, 14194 + ... + 15595.

It is an arithmetic number, because the mean of its divisors is an integer number (5228145).

Almost surely, 2^20882089 is an apocalyptic number.

It is an amenable number.

20882089 is a deficient number, since it is larger than the sum of its proper divisors (30491).

20882089 is an equidigital number, since it uses as much as digits as its factorization.

20882089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30490.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 20882089 is about 4569.6924404165. The cubic root of 20882089 is about 275.3750870644.

The spelling of 20882089 in words is "twenty million, eight hundred eighty-two thousand, eighty-nine".