20584121 has 2 divisors, whose sum is σ = 20584122. Its totient is φ = 20584120.

The previous prime is 20584117. The next prime is 20584141. The reversal of 20584121 is 12148502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14137600 + 6446521 = 3760^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 20584121 - 2² = 20584117 is a prime.

It is not a weakly prime, because it can be changed into another prime (20584141) 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 as a sum of consecutive naturals, namely, 10292060 + 10292061.

It is an arithmetic number, because the mean of its divisors is an integer number (10292061).

Almost surely, 2^20584121 is an apocalyptic number.

It is an amenable number.

20584121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20584121 is an equidigital number, since it uses as much as digits as its factorization.

20584121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 20584121 is about 4536.9726690823. The cubic root of 20584121 is about 274.0590252365.

The spelling of 20584121 in words is "twenty million, five hundred eighty-four thousand, one hundred twenty-one".