20098849 has 4 divisors (see below), whose sum is σ = 20972736. Its totient is φ = 19224964.

The previous prime is 20098847. The next prime is 20098853. The reversal of 20098849 is 94889002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20098849 - 2¹ = 20098847 is a prime.

It is a super-2 number, since 2×20098849² = 807927462249602, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20098847) 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, 436909 + ... + 436954.

It is an arithmetic number, because the mean of its divisors is an integer number (5243184).

Almost surely, 2^20098849 is an apocalyptic number.

It is an amenable number.

20098849 is a deficient number, since it is larger than the sum of its proper divisors (873887).

20098849 is an equidigital number, since it uses as much as digits as its factorization.

20098849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873886.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 20098849 is about 4483.1739872550. The cubic root of 20098849 is about 271.8882227065. Note that the first 3 decimals are identical.

The spelling of 20098849 in words is "twenty million, ninety-eight thousand, eight hundred forty-nine".