20198519 has 8 divisors (see below), whose sum is σ = 22547712. Its totient is φ = 17934840.

The previous prime is 20198513. The next prime is 20198543. The reversal of 20198519 is 91589102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20198519 - 2²⁰ = 19149943 is a prime.

It is a super-2 number, since 2×20198519² = 815960339586722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20198513) 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 in 7 ways as a sum of consecutive naturals, for example, 20879 + ... + 21824.

It is an arithmetic number, because the mean of its divisors is an integer number (2818464).

Almost surely, 2^20198519 is an apocalyptic number.

20198519 is a deficient number, since it is larger than the sum of its proper divisors (2349193).

20198519 is a wasteful number, since it uses less digits than its factorization.

20198519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42757.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 20198519 is about 4494.2762487413. The cubic root of 20198519 is about 272.3369122050.

The spelling of 20198519 in words is "twenty million, one hundred ninety-eight thousand, five hundred nineteen".