20084399 has 2 divisors, whose sum is σ = 20084400. Its totient is φ = 20084398.

The previous prime is 20084381. The next prime is 20084401. The reversal of 20084399 is 99348002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20084399 - 2⁸ = 20084143 is a prime.

Together with 20084401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20084329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10042199 + 10042200.

It is an arithmetic number, because the mean of its divisors is an integer number (10042200).

Almost surely, 2^20084399 is an apocalyptic number.

20084399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20084399 is an equidigital number, since it uses as much as digits as its factorization.

20084399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20084399 is about 4481.5621160484. The cubic root of 20084399 is about 271.8230493771.

The spelling of 20084399 in words is "twenty million, eighty-four thousand, three hundred ninety-nine".