20098439 has 2 divisors, whose sum is σ = 20098440. Its totient is φ = 20098438.

The previous prime is 20098417. The next prime is 20098451. The reversal of 20098439 is 93489002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20098439 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 20098399 and 20098408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20098489) 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, 10049219 + 10049220.

It is an arithmetic number, because the mean of its divisors is an integer number (10049220).

Almost surely, 2^20098439 is an apocalyptic number.

20098439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20098439 is an equidigital number, since it uses as much as digits as its factorization.

20098439 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 20098439 is about 4483.1282604895. The cubic root of 20098439 is about 271.8863739285.

The spelling of 20098439 in words is "twenty million, ninety-eight thousand, four hundred thirty-nine".