20098839 has 4 divisors (see below), whose sum is σ = 26798456. Its totient is φ = 13399224.

The previous prime is 20098817. The next prime is 20098847. The reversal of 20098839 is 93889002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20098839 - 2⁹ = 20098327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20098797 and 20098806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20098889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3349804 + ... + 3349809.

It is an arithmetic number, because the mean of its divisors is an integer number (6699614).

Almost surely, 2^20098839 is an apocalyptic number.

20098839 is a deficient number, since it is larger than the sum of its proper divisors (6699617).

20098839 is an equidigital number, since it uses as much as digits as its factorization.

20098839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6699616.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 20098839 is about 4483.1728719736. The cubic root of 20098839 is about 271.8881776147. Note that the first 3 decimals are identical.

The spelling of 20098839 in words is "twenty million, ninety-eight thousand, eight hundred thirty-nine".