20882209 has 2 divisors, whose sum is σ = 20882210. Its totient is φ = 20882208.

The previous prime is 20882203. The next prime is 20882261. The reversal of 20882209 is 90228802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 1697809 = 4380^2 + 1303^2 .

It is a cyclic number.

It is not a de Polignac number, because 20882209 - 2⁹ = 20881697 is a prime.

It is not a weakly prime, because it can be changed into another prime (20882203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10441104 + 10441105.

It is an arithmetic number, because the mean of its divisors is an integer number (10441105).

Almost surely, 2^20882209 is an apocalyptic number.

It is an amenable number.

20882209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20882209 is an equidigital number, since it uses as much as digits as its factorization.

20882209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 20882209 is about 4569.7055703842. The cubic root of 20882209 is about 275.3756145491.

The spelling of 20882209 in words is "twenty million, eight hundred eighty-two thousand, two hundred nine".