20324891 has 2 divisors, whose sum is σ = 20324892. Its totient is φ = 20324890.

The previous prime is 20324881. The next prime is 20324921. The reversal of 20324891 is 19842302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20324891 - 2¹⁴ = 20308507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20324881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162445 + 10162446.

It is an arithmetic number, because the mean of its divisors is an integer number (10162446).

Almost surely, 2^20324891 is an apocalyptic number.

20324891 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324891 is an equidigital number, since it uses as much as digits as its factorization.

20324891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20324891 is about 4508.3135427785. The cubic root of 20324891 is about 272.9036903049.

The spelling of 20324891 in words is "twenty million, three hundred twenty-four thousand, eight hundred ninety-one".